When the metal bar is not moving, the induced emf between the ends of the rod is zero , when the metal bar is moving perpendicular to its length and the magnetic field with a speed of 50 cm/s, the induced emf between the ends of the rod is 0.375 V.
(a) When the metal bar is stationary and perpendicular to the magnetic field, it will experience a magnetic force which will push the free electrons in the metal to one end of the bar, resulting in an accumulation of charges at either end of the bar. This separation of charges will result in an induced emf across the ends of the bar.
The induced emf is given by:
emf = Blv
where B is the magnetic field strength, l is the length of the metal bar, and v is the velocity of the metal bar perpendicular to the magnetic field.
Substituting the given values, we get:
emf = B * l * v = 3 T * 0.25 m * 0 m/s = 0 V
Therefore, when the metal bar is not moving, the induced emf between the ends of the rod is zero.
(b) When the metal bar is moving perpendicular to its length and the magnetic field with a speed of 50 cm/s, it will experience an induced emf due to the relative motion between the bar and the magnetic field.
The induced emf is given by:
emf = Blv
Substituting the given values, we get:
emf = B * l * v = 3 T * 0.25 m * 0.5 m/s = 0.375 V
Therefore, when the metal bar is moving perpendicular to its length and the magnetic field with a speed of 50 cm/s, the induced emf between the ends of the rod is 0.375 V.
Learn more about metal bar
https://brainly.com/question/31595223
#SPJ4
a solar cell has a light-gathering area of 10 cm2 and produces 0.2 a at 0.8 v (dc) when illuminated with s = 1000 w/m2 of sunlight. what is the efficiency of this solar cell?
A solar cell has a light-gathering area of 10 cm2 and produces 0.2 a at 0.8 v (dc) when illuminated with s = 1000 w/m2 of sunlight. The efficiency of this solar cell is 16%.
The efficiency of a solar cell is defined as the ratio of the electrical power output to the incident power from the sunlight. We can calculate the electrical power output of the solar cell as follows:
P = I x V
where P is the electrical power output in watts (W), I is the current in amperes (A), and V is the voltage in volts (V).
In this case, the current I = 0.2 A and the voltage V = 0.8 V. Therefore, the electrical power output P is:
P = 0.2 A x 0.8 V = 0.16 W
The incident power from the sunlight can be calculated using the given value of solar irradiance s = 1000 W/m² and the light-gathering area A = 10 cm². First, we need to convert the area from square centimetres to square meters:
A = 10 cm² x (1 m / 100 cm)² = 0.001 m²
Then, we can calculate the incident power as:
Pin = s x A = 1000 W/m² x 0.001 m² = 1 W
[tex]Therefore, the efficiency of the solar cell is:[/tex]
η = Pout / Pin = 0.16 W / 1 W = 0.16 or 16%
The efficiency of the solar cell is 16%.
To learn more about electrical power output, refer:-
https://brainly.com/question/13797317
#SPJ11
A 0.26 kg softball has a velocity of 19 m/s at an angle of 28° below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball while it is in contact with the bat if the ball leaves the bat with a velocity of (a)18 m/s, vertically downward, and (b)18 m/s, horizontally back toward the pitcher?
(a) The downward momentum change is equal to 5.5 kg/s. (b) Momentum change: 5.5 kgm/s backwards towards the pitcher.
A ball's momentum changes when it makes contact with a bat due to the force applied to it. The following calculation can be used to determine how much this change in momentum is:
P equals (vf - vi)
where p denotes the change in momentum, m denotes the ball's mass, vf denotes the ball's final velocity following contact, and vi is the ball's initial velocity before to contact.
The ball's initial velocity in this scenario is 19 m/s at an angle of 28° below the horizontal, and its mass is 0.26 kg. To determine the speed at which the ball after contact, we must take the two situations into account independently.
The ball's final vertical downward velocity in case (a) is 18 m/s. Using the above formula, we obtain:
Vertically downhill, p = 0.26 kg * (18 m/s - 19 m/scos(28°)) = 5.5 kgm/s.
In case (b), the ball's final horizontal velocity back towards the pitcher is 18 m/s. By applying the same formula, we obtain:
In a horizontal direction, returning towards the pitcher, p = 0.26 kg * (18 m/scos(28°) - 19 m/s) = 5.5 kgm/s.
The magnitude of the momentum change in both situations is 5.5 kg*m/s, but the direction of the change varies.
learn more about momentum here:
https://brainly.com/question/30677308
#SPJ11
The ____ of a planet is the region around the planet where the magnetic field is able to deflect the solar wind and other charged particles. Group of answer choices aurora magnetosphere hydrosphere corona Schwarzschild radius
The magnetosphere of a planet is the region around the planet where the magnetic field is able to deflect the solar wind and other charged particles.
The magnetosphere plays a crucial role in protecting the planet from harmful solar radiation and preserving its atmosphere. This region extends out from the planet's core, where the magnetic field is generated, and acts as a shield against the constant bombardment of charged particles from the sun.
The interaction between the magnetosphere and the solar wind can also create phenomena like auroras, which are visible displays of light in the polar regions. Understanding the magnetosphere is essential for studying the effects of solar activity on Earth's environment and for planning space missions, as it can have significant impacts on satellite operations and astronaut safety.
To know more about magnetosphere, refer here:
https://brainly.com/question/10424668#
#SPJ11
Complete question:
The ____ of a planet is the region around the planet where the magnetic field is able to deflect the solar wind and other charged particles. Group of answer choices
a. aurora
b. magnetosphere
c. hydrosphere
d. corona
e. Schwarzschild radius
A parallel plate capacitor with circular plates of radius and plate separation is being charged at the rate of .
A parallel plate capacitor consists of two parallel conducting plates separated by a distance, with an insulating material known as a dielectric in between them. Capacitors are used in electronic circuits to store electric charge and energy.
The charging rate is typically measured in amperes A or coulombs per second C/s.
The coming to the question of charging this capacitor, we know that the charging rate of a capacitor is determined by the current flowing into it. When a voltage is applied across the plates of the capacitor, electrons flow from one plate to the other, resulting in a buildup of charge on each plate. The charging rate is typically measured in amperes (A) or coulombs per second (C/s). In the case of a circular parallel plate capacitor, the plates are circular in shape with a radius, and the plate separation is the distance between them. The separation between the plates affects the capacitance of the capacitor. The capacitance of a parallel plate capacitor is directly proportional to the surface area of the plates and inversely proportional to the distance between them. As the separation between the plates decreases, the capacitance of the capacitor increases.
learn more about capacitor here.
https://brainly.com/question/28939834
#SPJ11
If at a particular instant and at a certain point in space the electric field is in the x-direction and has a magnitude of 5.00 V/m , what is the magnitude of the magnetic field of the wave at this same point in space and instant in time
The magnitude of the magnetic field cannot be determined without additional information about the wave.
In order to determine the magnitude of the magnetic field at a particular instant and point in space, we need more information about the wave.
Specifically, we need to know the frequency of the wave, as well as the speed of light in the medium through which the wave is traveling.
This is because the relationship between the electric and magnetic fields in an electromagnetic wave is determined by Maxwell's equations, which are dependent on these factors.
Without this additional information, we cannot calculate the magnitude of the magnetic field.
For more such questions on magnitude, click on:
https://brainly.com/question/24468862
#SPJ11
A 1.00-MΩ voltmeter is placed in parallel with a 75.0-k Ω resistor in a circuit.(a) Draw a circuit diagram of the connection.(b) What is the resistance of the combination?(c) If the voltage across the combination is kept the same as it was across the 75.0-k Ω resistor alone, what is the percent increase in current?(d) If the current through the combination is kept the same as it was through the 75.0-k Ω resistor alone, what is the percentage decrease in voltage?(e) Are the changes found in parts (c) and (d) significant? Discuss.
The Circuit diagram Nin the circuit diagram, draw the 75.0-kΩ resistor as a horizontal line with the label "75.0 kΩ" beneath it. Place the 1.00-MΩ voltmeter in parallel with the resistor by drawing another horizontal line. l
Resistance of the combination to find the equivalent resistance of two resistors in parallel, use the formula:
1/R total = 1/R1 + 1/R21/R total = 1/ (75.0 kΩ) + 1/ (1.00 MΩ)
Convert the resistances to
ohms:1/R total = 1/75000 + 1/1000000
Calculate the total resistance.
R total ≈ 71.43 kΩ
Percent increase in current Using Ohm's Law (V = IR), we know that the current (I) is directly proportional to the voltage (V) and inversely proportional to the resistance (R). Since the voltage remains the same, the increase in current can be calculated as: % Increase in current.
= [(R1 -R total)/R total] * 100= [(75000 - 71430)/71430] * 100≈ 4.98%
Percentage decrease in voltage If the current is kept the same, the voltage across the combination will decrease due to the lower resistance. The percentage decrease in voltage can be calculated as: % Decrease.
in voltage = [(V1 - V total)/V1] * 100= [(75.0 kΩ - 71.43 kΩ)/75.0 kΩ] * 100≈ 4.76%
learn more about Circuit diagram here.
https://brainly.com/question/31266164
#SPJ11
Harlow Shapley determined the position of the Sun in the galaxy by measuring the distances to 93 globular clusters of stars. How did Shapley obtain the distances to these very distant clusters?
Harlow Shapley determined the position of the Sun in the galaxy by measuring the distances to 93 globular clusters of stars. To obtain these distances, he used a technique called "variable stars." Certain types of stars, known as Cepheid variables, pulsate at a regular rate that is related to their luminosity.
By observing the period of their pulsations, astronomers can determine their luminosity, which in turn can be used to determine their distance from us. Shapley used photographic plates to observe the variable stars in the globular clusters. He was able to measure the periods of their pulsations and estimate their luminosities. He then compared the apparent brightness of the stars to their known luminosities to calculate their distances from us. This technique was groundbreaking at the time, as it allowed astronomers to measure the distances to objects that were previously thought to be too far away to be measured accurately. Shapley's measurements of the distances to the globular clusters showed that they were not distributed evenly in the galaxy, but were concentrated in a region that was offset from the center of the galaxy. This led him to conclude that the Sun was not at the center of the galaxy, as had previously been believed, but was located in the outer regions of the galaxy.
for more such questions on distances
https://brainly.com/question/26550516
#SPJ11
33. A gas of helium atoms at 273 K is in a cubical container with 25.0 cm on a side. (a) What is the minimum uncertainty in momentum components of helium atoms
The minimum uncertainty in momentum components of helium atoms is approximately 4.59 x 10⁻³³ kg m/s. According to the Heisenberg uncertainty principle, there is a minimum uncertainty in the momentum and position of a particle.
This uncertainty can be expressed as ΔpΔx ≥ h/4π, where Δp is the uncertainty in momentum, Δx is the uncertainty in position, and h is Planck's constant. In this case, we are dealing with a gas of helium atoms at 273 K in a cubical container with 25.0 cm on a side.
To calculate the minimum uncertainty in momentum components of helium atoms, we can use the formula Δp = h/2Δx. Since the container is cubic, we can assume that the uncertainty in position is equal in all three dimensions, which means Δx = 25.0 cm/2[tex]\sqrt{3}[/tex] = 7.21 cm. Substituting this value into the formula gives us:
Δp = h/2Δx = 6.626 x 10⁻³⁴ J s / 2(7.21 x 10^-2 m) = 4.59 x 10⁻³³ kg m/s
Therefore, the minimum uncertainty in momentum components of helium atoms is approximately 4.59 x 10⁻³³ kg m/s.
Learn more about Heisenberg uncertainty principle here:
https://brainly.com/question/30402752
#SPJ11
A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic energy, in kJ (kiloJoules)
A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s,Then the metabolic energy expended by the sprinter is 0.192 kJ.
What is metabolic energy?Metabolic energy is the energy expended by an organism during metabolism, which includes all the biochemical processes that occur in the body to sustain life and produce energy.
What is acceleration?Acceleration is the rate at which an object changes its velocity with time. It is the increase or decrease in speed, or a change in direction, or both.
According to the given information:
A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s,to find the metabolic energy expended by the sprinter, we can use the formula:
Metabolic Energy = (0.5 x mass x velocity^2) / time
Substituting the given values, we get:
Metabolic Energy = (0.5 x 75 kg x (8.0 m/s)^2) / 5.0 s
Metabolic Energy = 192 J
However, the answer is required in kJ (kiloJoules), so we need to convert J to kJ by dividing by 1000:
Metabolic Energy = 192 J / 1000
Metabolic Energy = 0.192 kJ
Therefore, the metabolic energy expended by the sprinter is 0.192 kJ.
To know more about metabolic energy visit:
https://brainly.com/question/30484037
#SPJ11
Wind gusts create ripples on the ocean that have a wavelength of 6.57 cm and propagate at 3.33 m/s. What is their frequency
The frequency of the ripples on the ocean created by wind gusts is 50.7 Hz.
The frequency of the ripples created by wind gusts on the ocean can be determined using the formula:
frequency = speed/wavelength
Here, the speed of propagation of the ripples is given as 3.33 m/s, and their wavelength is given as 6.57 cm (or 0.0657 m). Plugging in these values, we get:
frequency = 3.33/0.0657 = 50.7 Hz
Therefore, the frequency of the ripples on the ocean created by wind gusts is 50.7 Hz. This means that there are 50.7 wave crests passing through a fixed point in one second.
The frequency of these ripples is dependent on the speed of propagation and the wavelength of the waves. The shorter the wavelength, the higher the frequency, while the slower the speed of propagation, the lower the frequency. The frequency of the ripples can have important implications for marine ecosystems and coastal communities, as it can affect the behavior and distribution of marine organisms, as well as the erosion and deposition of sediments along coastlines.
To know more about frequency, refer to the link below:
https://brainly.com/question/29757531#
#SPJ11
an electron is located on a pinpoint having a diameter 2.5. what is the minimum uncertainty in the speed of the electron
Therefore, the minimum uncertainty in the speed of the electron is approximately 1.44 x [tex]10^6[/tex] m/s.
According to Heisenberg's uncertainty principle, the product of the uncertainties in the position (Δx) and momentum (Δp) of a particle must be greater than or equal to Planck's constant divided by 4π:
Δx Δp ≥ h/4π
Here h is the Planck's constant.
In this case, the electron is located on a pinpoint with a diameter of 2.5, which we can take as the uncertainty in its position:
Δx = 2.5 m
To find the minimum uncertainty in the speed of the electron, we need to relate momentum and speed. The momentum of an electron is given by:
p = mv
here m is the mass of the electron and v is its velocity. Therefore, the uncertainty in momentum can be related to the uncertainty in velocity as follows:
Δp = mΔv
where Δv is the uncertainty in velocity.
Substituting this relation into Heisenberg's uncertainty principle and solving for Δv, we get:
Δv ≥ h/4πmΔx
Substituting the known values for h, m (mass of electron), and Δx, we get:
Δv ≥ [tex](6.626 * 10^{-34} J s)/(4* pi * 9.109 * 10^-{31} kg * 2.5 m)[/tex]
Simplifying this expression, we get:
Δv ≥ 1.44 x [tex]10^6[/tex] m/s
Learn more about electron visit: brainly.com/question/860094
#SPJ4
A 6.5-cm-diameter horizontal pipe gradually narrows to 4.7 cm. When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 31.5 kPa and 24.8 kPa, respectively. What is the volume rate of flow?
To solve this problem, we can use the principle of conservation of mass and Bernoulli's equation.
First, let's find the velocity of the water at each section of the pipe. We can use the continuity equation, which states that the volume rate of flow is constant throughout the pipe:
A1V1 = A2V2
where A1 and A2 are the cross-sectional areas of the pipe at the two sections, and V1 and V2 are the velocities of the water at the respective sections.
The cross-sectional area of a circular pipe is given by:
A = πr^2
where r is the radius of the pipe.
Using the given diameters of the pipe, we can find the radii of the two sections:
r1 = 6.5 cm / 2 = 3.25 cm
r2 = 4.7 cm / 2 = 2.35 cm
Therefore, the cross-sectional areas of the two sections are:
A1 = π(3.25 cm)^2 ≈ 33.183 cm^2
A2 = π(2.35 cm)^2 ≈ 17.237 cm^2.
Learn more about Bernoulli's here:
https://brainly.com/question/30509621
#SPJ11
Suppose a police car, emitting a frequency of 500 Hz, is traveling towards you at 6 m/s. The frequency you observe will be:
The frequency you observe will be approximately 517.2 Hz.
f{observed = f{source} x (v{sound} +/- v{observer)} / (v{sound} +/- v{source}
f{observed = 500 * (343 + 0) / (343 - 6) = 517.2 Hz
Frequency is a fundamental concept in physics that refers to the number of oscillations or cycles of a periodic waveform that occur per unit time. It is usually measured in units of Hertz (Hz), which is equivalent to one cycle per second.
In simple terms, the frequency of a wave is determined by the speed at which it travels and the length of each wave cycle. For example, the frequency of a sound wave is determined by the speed of sound in a medium, such as air, and the length of each sound wave cycle. Frequency plays a crucial role in many areas of physics, including wave mechanics, electromagnetism, and quantum mechanics.
To learn more about Frequency visit here:
brainly.com/question/5102661
#SPJ4
Explain why there would be a force on a magnet as a result of the magnet being moved in the proximity of a coil of wire.
A force on a magnet occurs when it is moved near a coil of wire due to electromagnetic induction.
When a magnet is moved near a coil of wire, the changing magnetic field created by the movement of the magnet induces an electric current in the wire. This induced current, in turn, generates its own magnetic field, which opposes the change in the original magnetic field according to Lenz's law. This interaction between the magnetic fields creates a force on the magnet.
The force on a magnet when moved near a coil of wire results from the electromagnetic induction and the interaction of magnetic fields due to the induced current in the wire.
To know more about Lenz's law, visit:
https://brainly.com/question/12876458
#SPJ11
Of the total energy consumed in a machining operation, what is the proportion of energy converted to heat
The proportion of energy converted to heat in a machining operation typically ranges between 70-90% of the total energy consumed.
The proportion of energy converted to heat in a machining operation can vary depending on several factors such as the material being machined, cutting tool, and machining parameters. However, it is generally estimated that a significant portion, around 70-90% of the total energy consumed, is converted into heat during the process.
Machining operations involve material removal through cutting, grinding, or drilling. During these processes, a considerable amount of friction is generated between the cutting tool and the workpiece, resulting in heat production. This heat can negatively affect the cutting tool's performance, workpiece dimensional accuracy, and surface finish quality.
The primary sources of heat generation in machining operations are as follows:
1. Primary deformation zone:
Heat is generated due to the plastic deformation of the material being removed from the workpiece. This accounts for approximately 60-80% of the total heat generated.
2. Secondary deformation zone:
Heat is produced due to friction between the newly formed chip and the rake face of the cutting tool. This accounts for around 10-30% of the total heat generated.
3. Tool-chip interface:
The friction between the cutting tool and the chip contributes to additional heat generation, which is approximately 5-10% of the total heat produced.
To minimize heat generation and its adverse effects on machining operations, various techniques can be employed, such as optimizing cutting parameters, using proper cutting fluids, and selecting suitable tool materials and coatings.
This heat is primarily generated in the primary and secondary deformation zones, as well as at the tool-chip interface, and can negatively impact the machining process's performance and product quality.
Learn more about energy:
https://brainly.com/question/13881533
#SPJ11
5. A mass of 225 g is suspended from a vertical spring. It is then pulled down 15 cm and released. The mass completes 10 oscillations in a time of 32 seconds. What is the force constant for the spring
The force constant of the spring is approximately 5.53 N/m.
The force constant of a spring can be calculated using the formula:
k = (mg) / x
In this problem, we are given the mass of the object (m = 225 g = 0.225 kg) and the displacement of the spring (x = 15 cm = 0.15 m).
To calculate the force constant, we first need to calculate the gravitational force acting on the mass:
F = mg = (0.225 kg)(9.81 m/s^2) ≈ 2.21 N
Next, we need to find the period of oscillation, T, using the given information that the mass completes 10 oscillations in a time of 32 seconds:
T = t / n = 32 s / 10 = 3.2 s
The period of oscillation is related to the force constant and the mass by the equation:
T = 2π * sqrt(m/k)
Rearranging this equation to solve for the force constant, we get:
k = (4π^2 * m) / T^2
Substituting the known values, we get:
k = (4π^2 * 0.225 kg) / (3.2 s)^2 ≈ 5.53 N/m
Learn more about oscillation here:
https://brainly.com/question/30111348
#SPJ11
A cyclist starts from rest and pedals such that the wheels of his bike have a constant angular acceleration. After 17 s, the wheels have made 60 revolutions. If the radius of the wheel is 30 cm, how far did the bike travel
The bike travels 11,304 cm (or 113.04 meters) in 17 seconds.
The angular acceleration is constant, so we can use the equation:
θ = 1/2 α t²+ [tex]w_i[/tex] t
In 17 seconds, the wheels have made 60 revolutions or 60 * 2π radians of rotation. Therefore, θ = 60 * 2π.
We know the radius of the wheel is 30 cm, so the distance traveled by the bike is equal to the arc length of the circle traced by the wheel. The arc length is given by:
s = rθ
where r is the radius of the wheel and θ is the angle of rotation in radians.
Substituting our values, we get:
s = (30 cm) * (60 * 2π) = 11,304 cm
Distance is a crucial parameter in the study of motion, energy, and forces. It plays a key role in the formulation of laws such as Newton's laws of motion and the law of gravitation. Distance is also used to describe the size and position of objects in space, from subatomic particles to galaxies.
In everyday life, distance is a ubiquitous concept that we use to navigate and communicate. It helps us to determine how far we need to travel to reach a destination, estimate the time it takes to get there and understand the size and layout of our environment. Distance also affects our social interactions, as it can influence the level of intimacy or separation between people.
To learn more about Distance visit here:
brainly.com/question/26711747
#SPJ4
A charge of +.4 mC is at (-3, 0) meters and a charge of +.9 mC is at (+1, 0) meters.
What is the magnitude of the force felt by a +.5 mC charge placed at (0, 3) meters due to the original two charges?
Group of answer choices
a) 494.38 N
b) 458.53 N
c) 524.73 N
d) 433.83 N
e) 388.66 N
We can calculate the force felt by the +0.5 mC charge using Coulomb's law, which states that the force between two charges is given by: F = k * (q1 * q2) / r^2
where k is Coulomb's constant (9 x 10^9 N*m^2/C^2), q1 and q2 are the charges, and r is the distance between them.
First, let's calculate the force due to the +0.4 mC charge at (-3, 0) on the +0.5 mC charge at (0, 3). The distance between them is:
r1 = sqrt[(0 - (-3))^2 + (3 - 0)^2] = sqrt(18) = 3sqrt(2) meters
The force due to this charge is:
F1 = k * [(+0.4 mC) * (+0.5 mC)] / (3sqrt(2))^2 = 2.58 x 10^-4 N
Next, let's calculate the force due to the +0.9 mC charge at (+1, 0) on the +0.5 mC charge at (0, 3). The distance between them is:
r2 = sqrt[(1 - 0)^2 + (3 - 0)^2] = sqrt(10) meters
The force due to this charge is:
F2 = k * [(+0.9 mC) * (+0.5 mC)] / (sqrt(10))^2 = 4.24 x 10^-4 N
The net force on the +0.5 mC charge is the vector sum of the two forces, which is:
Fnet = sqrt(F1^2 + F2^2) = sqrt[(2.58 x 10^-4)^2 + (4.24 x 10^-4)^2] = 4.99 x 10^-4 N
Therefore, the magnitude of the force felt by the +0.5 mC charge placed at (0, 3) meters due to the original two charges is approximately 0.499 N or 499 mN, which is closest to option (c) 524.73 N (which is not the correct answer).
Learn more about force here:
https://brainly.com/question/13191643
#SPJ11
three rods of copper are of different lengths, 1.0m, 2.0 m, and 3.0 long. they are all heated from 10 *C to 50 *C. Which one increases in length the most
The 3.0m long copper rod increases in length the most when heated from 10°C to 50°C.
The increase in length of a material due to heating is determined by its coefficient of thermal expansion (CTE). Copper has a CTE of 16.5 x 10^-6 / *C. Using the formula ΔL = L0 * CTE * ΔT, where ΔL is the change in length, L0 is the original length, CTE is the coefficient of thermal expansion, and ΔT is the change in temperature, we can calculate the increase in length for each copper rod.
For the 1.0m rod:
ΔL = 1.0m * 16.5 x 10^-6 / *C * (50-10) *C
ΔL = 1.32 x 10^-3 m
For the 2.0m rod:
ΔL = 2.0m * 16.5 x 10^-6 / *C * (50-10) *C
ΔL = 2.64 x 10^-3 m
For the 3.0m rod:
ΔL = 3.0m * 16.5 x 10^-6 / *C * (50-10) *C
ΔL = 3.96 x 10^-3 m
Therefore, the 3.0m copper rod increases in length the most.
More on copper: https://brainly.com/question/13151305
#SPJ11
Find the acceleration of a hamster when it increases its velocity from rest to 5.0 m/s in 1.6 s . Express your answer to two significant figures and include the appropriate units. a
The acceleration of the hamster can be found using the equation:
a = (vf - vi)/t
where vf is the final velocity (5.0 m/s), vi is the initial velocity (0 m/s since the hamster starts from rest), and t is the time taken to reach the final velocity (1.6 s).a = (5.0 m/s - 0 m/s)/1.6 s
a = 3.13 m/s^2
Therefore, the acceleration of the hamster when it increases its velocity from rest to 5.0 m/s in 1.6 s is 3.13 m/s^2 (to two significant figures).
To find the acceleration of the hamster, we can use the formula:
a = (v_f - v_i) / t
where a is the acceleration, v_f is the final velocity (5.0 m/s), v_i is the initial velocity (0 m/s, as the hamster starts from rest), and t is the time (1.6 s). Plugging in the values, we get:
a = (5.0 m/s - 0 m/s) / 1.6 s
a = 5.0 m/s / 1.6 s
a ≈ 3.1 m/s²
So, the acceleration of the hamster is approximately 3.1 m/s² (to two significant figures), with the appropriate unit being meters per second squared.
To know more about hamster visit:-
https://brainly.com/question/4617831
#SPJ11
. One kg of a soil was sieved through a set of 8 sieves with the size 4.75 mm, 2.0 mm, 600µ, 425µ, 300µ, 212µ, 150µ and 75µ. The weight of soil retained on these sieves was found to be 50, 78, 90, 150, 160, 132, 148 and 179 gm respectively. Draw a particle size distribution curve and determine the uniformity coefficient and coefficient of curvature.
The particle size distribution curve shows a decreasing trend with increasing particle size. The uniformity coefficient is 3.09, indicating that the soil has a wide range of particle sizes. The coefficient of curvature is 0.86, indicating that the soil is poorly graded.
The particle size distribution curve is a graph showing the percentage of soil retained on each sieve plotted against the logarithm of the particle size. The curve shows a decreasing trend with increasing particle size, indicating that the soil contains a range of particle sizes.
The uniformity coefficient is calculated by dividing the size of the sieve opening that passes 60% of the soil by the size of the sieve opening that passes 10% of the soil. In this case, the uniformity coefficient is 3.09, indicating that the soil has a wide range of particle sizes.
The coefficient of curvature is calculated as the ratio of the difference between the log of the size of the sieve opening that passes 60% of the soil and the log of the size of the sieve opening that passes 10% of the soil, divided by the difference between the log of the size of the sieve opening that passes 90% of the soil and the log of the size of the sieve opening that passes 10% of the soil. In this case, the coefficient of curvature is 0.86, indicating that the soil is poorly graded.
Learn more about coefficient coefficient here:
https://brainly.com/question/28975079
#SPJ11
An artificial satellite circles the Earth in a circular orbit at a location where the acceleration due to gravity is 7.59 m/s2. Determine the orbital period of the satellite.
The orbital period of the Satellite is approximately 13,000 seconds or 6.5 hours.
To determine the orbital period of a satellite, we can use Kepler's third law, which states that the square of the orbital period (T) is proportional to the cube of the average distance from the satellite to the center of the Earth (r). Mathematically, it can be expressed as:
T^2 = (4π^2 / GM) * r^3
where G is the gravitational constant and M is the mass of the Earth.
Given:
Acceleration due to gravity (g) = 7.59 m/s^2
We can calculate the average distance from the satellite to the center of the Earth using the acceleration due to gravity. The acceleration due to gravity is related to the gravitational force as:
g = GM / r^2
Rearranging the equation, we can solve for r:
r^2 = GM / g
Now, substituting this value of r into the equation for the orbital period:
T^2 = (4π^2 / GM) * (GM / g)^3/2
= (4π^2 / g) * (GM)^1/2
Taking the square root of both sides, we get:
T = 2π * (GM / g)^1/2
Plugging in the known values:
T = 2π * [(6.67430 × 10^-11 m^3/(kg s^2) * (5.972 × 10^24 kg) / (7.59 m/s^2)]^1/2
Calculating this expression gives us:
T ≈ 2π * (4.229 × 10^7 m^3 / s^2)^1/2
T ≈ 2π * 6,500 s
Therefore, the orbital period of the satellite is approximately 13,000 seconds or 6.5 hours.
To know more about Satellite .
https://brainly.com/question/8376398
#SPJ11
What is the maximum velocity of a photoelectron emitted from a surface whose work function is 5.0 eV when the surface is illuminated by radiation of 200 nm wavelength
The maximum velocity of the photoelectron is 3.9 x[tex]10^5[/tex] m/s.
The maximum velocity of a photoelectron emitted from a surface can be calculated using the equation:
KE = hν - Φ
where KE is the maximum kinetic energy of the photoelectron, h is Planck's constant, ν is the frequency of the incident radiation, and Φ is the work function of the surface.
In this case, the wavelength of the radiation is given as 200 nm. We can use the formula c = λν to find the frequency, where c is the speed of light.
ν = c / λ = [tex](3 x 10^8 m/s) / (200 x 10^-^9 m) = 1.5 x 10^1^5 Hz[/tex]
Substituting the values into the first equation, we get:
KE =[tex](6.63 x 10^-^3^4 J s)(1.5 x 10^1^5 Hz) - (5.0 eV)(1.6 x 10^-^1^9 J/eV) = 3.14 x 10^-^1^9 J[/tex]
The maximum velocity can be found using the equation:
KE = 1/2[tex]mv^2[/tex]
where m is the mass of the electron.
v = sqrt((2KE) / m) = sqrt[tex]((2 x 3.14 x 10^-^1^9 J) / (9.11 x 10^-^3^1 kg)) = 3.9 x 10^5 m/s[/tex]
Therefore, the maximum velocity of the photoelectron emitted from the surface is 3.9 x[tex]10^5 m/s.[/tex]
For more such questions on velocity, click on:
https://brainly.com/question/80295
#SPJ11
A race car travels with a constant tangential speed of 75.8 m/s around a circular track of radius 677 m. Find the magnitude of the total acceleration.
The magnitude of the total acceleration for the race car is approximately 8.51 m/s^2.
A race car traveling with a constant tangential speed of 75.8 m/s around a circular track of radius 677 m experiences both centripetal and tangential acceleration. To find the magnitude of the total acceleration, we first need to determine the centripetal acceleration.
Centripetal acceleration (a_c) can be calculated using the formula:
a_c = v^2 / r
Where v is the tangential speed (75.8 m/s) and r is the radius of the track (677 m).
a_c = (75.8 m/s)^2 / 677 m ≈ 8.51 m/s^2
Since there is no change in the car's tangential speed, its tangential acceleration (a_t) is 0.
Now, to find the magnitude of the total acceleration (a_total), we use the Pythagorean theorem:
a_total = sqrt(a_c^2 + a_t^2)
a_total = sqrt((8.51 m/s^2)^2 + (0 m/s^2)^2) ≈ 8.51 m/s^2
To learn more about : acceleration
https://brainly.com/question/460763
#SPJ11
Consider a star in the Milky Way, located 3 kpc from the center of our galaxy. Write down an expression that would tell you the mass interior to 3 kpc, M(r). Then consider a star that is at 9 kpc. What is the ratio of the mass interior to 9 kpc, to that interior to 3 kpc
The ratio of the mass interior to 9 kpc to that interior to 3 kpc is 27. To find the mass interior to a specific distance (r) in the Milky Way, you can use the mass distribution function M(r). This function depends on the density profile of the galaxy and the distance from its center. For simplicity, let's assume the density follows a spherically symmetric distribution.
For a star located 3 kpc from the center of the galaxy, the mass interior to that distance can be written as:
M(3 kpc) = ∫ρ(r) * 4π² dr, with the limits of integration being from 0 to 3 kpc.
Now consider a star at 9 kpc. To find the mass interior to this distance, you would use the same expression:
M(9 kpc) = ∫ρ(r) * 4π² dr, with the limits of integration being from 0 to 9 kpc.
To find the ratio of the mass interior to 9 kpc to that interior to 3 kpc, you simply divide the two expressions:
Ratio = M(9 kpc) / M(3 kpc).
As both expressions have the same integrand, the ratio can be calculated by dividing the limits of integration:
Ratio = (9 kpc)³ / (3 kpc)³ = 729 / 27 = 27.
Therefore, the ratio of the mass interior to 9 kpc to that interior to 3 kpc is 27. This assumes a constant density profile throughout the galaxy, which may not be entirely accurate, but it serves as a simple example to understand the concept.
Learn more about Milky Way here:
https://brainly.com/question/29910680
#SPJ11
An airplane that has an unbalanced amount of force acting on it will have a changing velocity. This statement is based directly on Newton's _____.
This statement is based directly on Newton's Second Law of Motion, which states that the force acting on an object is directly proportional to its mass and the acceleration produced by that force.
If an airplane experiences an unbalanced force, it will accelerate in the direction of the force. This acceleration will cause the airplane's velocity to change, either by increasing or decreasing depending on the direction of the force.
The magnitude of the change in velocity will be directly proportional to the force and inversely proportional to the mass of the airplane. Therefore, a larger force acting on a smaller airplane will cause a greater change in velocity compared to a smaller force acting on a larger airplane.
It's important to note that an airplane's velocity can also change due to other factors such as wind resistance, altitude, and the angle of the airplane's wings. However, Newton's Second Law of Motion provides the fundamental understanding of the relationship between force and acceleration, which can be used to explain how an airplane's velocity changes when an unbalanced force is acting upon it.
To know more about Law of Motion, refer to the link below:
https://brainly.com/question/13447525#
#SPJ11
A particle is said to be extremely relativistic when its kinetic energy is much greater than its rest energy. Part A Part complete What is the speed of a particle (expressed as a fraction of c ) such that the total energy is ten times the rest energy
A particle is said to be extremely relativistic when its kinetic energy is much greater than its rest energy. The speed of a particle (expressed as a fraction of c ) such that the total energy is ten times the rest energy is approximately 0.9949874.
To determine the speed of a particle (expressed as a fraction of the speed of light, c) such that the total energy is ten times the rest energy, we can use the relativistic energy equation:
E = γmc^2,
where E is the total energy of the particle, m is its rest mass, c is the speed of light, and γ is the Lorentz factor.
The Lorentz factor, γ, is given by:
γ = 1 / sqrt(1 - (v^2 / c^2)),
where v is the velocity of the particle.
Since we are given that the total energy is ten times the rest energy, we have:
E = 10mc^2.
Substituting this into the relativistic energy equation, we get:
10mc^2 = γmc^2.
Canceling out the mass and c^2 terms, we have:
10 = γ.
To find the velocity of the particle, we need to solve for v in terms of c. Rearranging the Lorentz factor equation, we have:
γ = 1 / sqrt(1 - (v^2 / c^2)),
Squaring both sides and rearranging, we get:
(v^2 / c^2) = 1 - 1 / γ^2.
Substituting γ = 10, we have:
(v^2 / c^2) = 1 - 1 / 10^2,
=>(v^2 / c^2) = 1 - 1 / 100,
=>(v^2 / c^2) = 99 / 100.
Taking the square root of both sides, we get:
v / c = sqrt(99 / 100),
=>v / c ≈ 0.9949874.
Therefore, the speed of the particle, expressed as a fraction of c, is approximately 0.9949874.
Learn more about particle at: https://brainly.com/question/30696138
#SPJ11
Find the ratio of kinetic energy to momentum of a 3500 kg car traveling at 40 m/s.
The ratio of kinetic energy to momentum of a 3500 kg car traveling at 40 m/s is 20 J·s/m.
The kinetic energy (KE) of an object is given by the formula,
KE = 1/2mv², mass of the object is m and its velocity is v
The momentum (p) of an object is given by the formula,
p = mv
So, for a 3500 kg car traveling at 40 m/s, we have,
KE = 1/2 x 3500 kg(40 m/s)²
KE = 2,800,000 J
p = 3500 kg x 40 m/s
p = 140,000 kg·m/s
The ratio of kinetic energy to momentum is simply KE/p, which gives,
KE/p = 2,800,000 J / 140,000 kg·m/s
KE/p = 20 J·s/m
Therefore, the ratio of kinetic energy to momentum of the car is 20 J·s/m.
To know more about kinetic energy and momentum, visit,
https://brainly.com/question/29200829
#SPJ1
In an RLC series circuit, the voltage amplitude and frequency of the source are 100 V and 500 Hz, respectively, and
The impedance of the circuit at resonance is 100 Ohms, and the quality factor Q is 31.83.
f = 1 / (2π√(LC))
where L is the inductance and C is the capacitance. Substituting the given values, we get:
f = 1 / (2π√(0.1 H x 10 nF))
= 1 / (2π√([tex]10^{-8[/tex]))
= 5,032 Hz
At resonance, the impedance of the circuit is purely resistive, and its value is given by:
Z = R
substituting the given resistance value, we get:
Z = 100 Ohms
To find the quality factor Q, we use the formula:
Q = ω0L / R
where ω0 is the resonant frequency in radians per second. Substituting the values we calculated, we get:
Q = 2πf0L / R
= 2π x 5,032 Hz x 0.1 H / 100 Ohms
= 31.83
Impedance is a physical property that describes the resistance of a circuit to the flow of electrical current. It is a measure of how much opposition a circuit offers to the flow of alternating current (AC) due to its resistance, capacitance, and inductance.
In simple terms, impedance is the total resistance of a circuit to the flow of an alternating current, taking into account both the resistance and reactance. Reactance is the opposition of a circuit to a change in voltage or current caused by capacitance or inductance. Impedance is measured in ohms and can be represented as a complex number with a real part (resistance) and an imaginary part (reactance).
To learn more about Impedance visit here:
brainly.com/question/30040649
#SPJ4
Two identical particles move toward each other, one twice as fast as the other. Just before they collide, one has a kinetic energy of 25 J and the other 100 J . At this instant their total kinetic energy is 75 J . 100 J . 25 J . 125 J . none of the above need more information
None of the above answer choices are correct. The total kinetic energy just before the collision is 25J.
We can use conservation of momentum and conservation of energy to solve this problem.
Let m be the mass of each particle, v1 be the velocity of the slower particle, and v2 be the velocity of the faster particle. We know that:
mv1 + mv2 = 0 (conservation of momentum)
and
(1/2)mv1^2 + (1/2)mv2^2 = 25 J + 100 J = 125 J (conservation of energy)
Simplifying the momentum equation, we get:
v2 = -2*v1
Substituting this into the energy equation and simplifying, we get:
5*v1^2 = 125 J
v1^2 = 25 J
v1 = ±5 m/s
Since the particles are moving towards each other, their relative velocity is the sum of their velocities, which is:
v_rel = v1 + v2 = v1 - 2*v1 = -v1
Therefore, the speed of the particles just before they collide is:
|v_rel| = |v1| = 5 m/s
The total kinetic energy just before the collision is:
(1/2)mv1^2 + (1/2)mv2^2 = (1/2)mv1^2 + (1/2)m(-2v1)^2 = 5/2m*v1^2 = 25J.
Therefore, the answer is 25J.
To learn more about energy, refer below:
https://brainly.com/question/1932868
#SPJ11