The aluminum ball will be repelled by the foam rod, meaning it will be pushed away from the foam rod and move in the opposite direction.
What is the direction?The direction can be defined as the route, course, or path followed by a person, group, or thing. It is the line of orientation that guides the way in which something is directed or moved. Direction also refers to the order or path of movement, be it forward, backward, up, down, or in any other specified way. Direction is an important element in life, as it serves to guide people and objects throughout their respective journeys. It can be used to explain the various movements of people, animals, and objects in the physical world, or it can be used to describe the paths taken to reach a goal. Direction is not only physical, but also mental, as it can refer to a persons way of thinking and their overall attitude.
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Calculate the work required to be done to stop a car of 1300 kg moving at a speed of 54 km/h.
Answer:
The work required to stop a car of 1300 kg moving at a speed of 54 km/h is 8.1 kJ. This is calculated by multiplying the car's mass (1300 kg) by its speed (54 km/h) and then by the acceleration due to gravity (9.8 m/s2). Here is a Brainly link that can provide you with more information on calculating the work needed to stop a vehicle: https://brainly.com/question/3134150.
ohm's law states that the potential difference across a metallic conductor is directly proportional to the current in the conductor at constant temperature. would you say the resistor used in this lab was ohmic (obeys ohm's law)? explain.
The potential difference across the resistor was found to be directly proportional to the current flowing through it at a constant temperature, then the resistor would be considered ohmic and would obey Ohm's law.
If the potential difference and current were found to have a non-linear relationship, then the resistor would be non-ohmic and would not obey Ohm's law. If the graph is a straight line passing through the origin, then the resistor is ohmic and obeys Ohm's law. If the graph is not a straight line passing through the origin, then the resistor is non-ohmic and does not obey Ohm's law.
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through a piece of copper wire 20 cm long and with a cross-sectional area of \u200b\u200b0.6 mm ^ 2 a charge of 4 cells is passed in 0.1 s. determine the voltage at the ends of the wire
Using Ohm's Law, the voltage at the ends of the wire can then be calculated as [tex]V = I*R = (4 cells)*(0.672 Ohms) = 2.688 Volts.[/tex]
What is Ohm's Law ?Ohm's Law states that the current through a conductor between two points is directly proportional to the potential difference or voltage across the two points, and inversely proportional to the resistance between them. In other words, the voltage across a resistor is proportional to the current flowing through it. This relationship is expressed mathematically as V=IR, where V represents the voltage, I is the current, and R is the resistance.
The voltage at the ends of the wire can be calculated using Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). In this case, the resistance of the copper wire is determined using the formula R = (resistivity of the material)*(length of the wire)/(cross-sectional area of the wire). The resistivity of copper is [tex]1.68 x 10^-8 Ohm-meters[/tex], so the resistance is equal to [tex](1.68 x 10^-8)*(20 cm)/(0.6 x 10^-3 m^2) = 0.672 Ohms.[/tex]
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what is the kinetic energy in joules of an electron accelerated from rest through a potential of 5 kv?
Answer:
1 V = 1 J / C definition of volt (unit of energy / charge)
Initial PE = 5 kV
Final KE = 5 kV potential energy converted to kinetic energy
5 kV = 5000 J / C final KE
a helicopter takes off vertically, with a constant speed v 0. while rising, the pilot releases a coin. (neglect air resistance!) the coin will...
a helicopter takes off vertically, with a constant speed [tex]V_o[/tex] while rising, the pilot releases a coin. so they initially rise with speed and then reduce its speed come to rest and then increase its speed as it goes down
Speed is the pace at which an object moves along a path over time. Calculating speed mathematically is rather simple; the average speed of an object is determined by dividing its distance traveled by its speed over that distance. On the other hand, the calculation of velocity is more difficult mathematically and can be done in a number of ways based on the information given regarding the object's motion.
According to given question acceleration is 0 because helicopter takes off constant velocity [tex]V_o[/tex] so when pilot releases a coin then they initially rise with speed and then reduce its speed come to rest and then increase its speed as it goes down
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Electrons moving through the circuit in the attached figure will go through the resistor from ?a) from b to a. b) from a to b.
To a from b Electrons through a circuit from of the negative to the positive end, slowing the movement of electrons as they circle the wire.
How can a resistor thwart current flow?A material's ability to oppose the electron flow that passes through it is referred to as resistance. It limits how much electrons may go through the substance. It is measured by ohms () and indicated by the symbol (R). Free electrons begin to accelerate when voltage is introduced across the resistor.
What happens when energy passes through a resistor?resistive energy dissipation A charge loses potential energy (Qu) as it passes through a resistor, where V is just the potential difference across the resistor force .
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you toss a ball straight up in the air, it goes up, comes down, and you catch it. if it took 4 s from when you threw it to when you caught it, how high did it go?
So, the height to which the ball was thrown is approximately 29.4 meters. To find the height to which the ball was thrown, we need to use the equation for motion under constant acceleration, which is given by:
h = vi * t + (1/2) * a * t^2
where h is the height, vi is the initial velocity (which is the upward velocity with which the ball was thrown), t is the time it took for the ball to reach its highest point, and a is the acceleration due to gravity (-9.8 m/s^2).
Since the ball was thrown upward and then came back down, it reached its highest point after half of the total time, which is 2 seconds. So, we can use 2 seconds for the value of t in the equation.
Next, we can solve for vi using the time it took for the ball to reach its highest point and the acceleration due to gravity:
vi = h / (2 * t) - (1/2) * a * t
Substituting the known values into the equation:
vi = h / (2 * 2) - (1/2) * (-9.8 m/s^2) * 2^2
vi = h / 4 + 9.8 m/s
Now, we can use the value of vi to find the height h:
h = vi * 2 - (1/2) * (-9.8 m/s^2) * 2^2
h = 2 * (h / 4 + 9.8 m/s) - (1/2) * (-9.8 m/s^2) * 2^2
h = 2 * (h / 4 + 9.8 m/s) + 9.8 m
h = (h / 2 + 19.6 m) + 9.8 m
h = h / 2 + 29.4 m
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Similarities and differences between thermionic emission and liquid evaporation
Thermionic emission is the thermally convinced inflow of charge carriers and vaporization is the process in which the liquid state changes into the vapor state.
Thermionic emission is the thermally convinced inflow of charge carriers from a face or over an implicit- energy barrier. This occurs as we know that the thermal energy which is given to the carrier overcomes the work function of the material.
Vaporization is the process in which the liquid state changes into the vapor state. Also when the temperature increases, the kinetic energy of the molecules increases. Due to this increase in kinetic energy, the force of attraction between the molecules reduces, which in turn escape into the surrounding in the form of vapors.
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a car accelerates at 2 meters/s/s. assuming the car starts from rest, how far will it travel in 10 s?
Total distance is a term that is used to refer to the length of a physical route or journey between two points. The car will travel a total distance of 200 meters in 10 seconds.
What is total distance?It is usually calculated by adding up the individual distances between the starting point and each intermediate point along the route, and then adding the final distance from the last intermediate point to the destination.
Total distance can also be calculated by using a mapping or navigation system, which can provide an accurate measurement of the distance between two points.
This is because when something accelerates at 2 meters/s/s, it means that it will increase its velocity by 2 meters/second every second. Since the car starts from rest, it will have a velocity of 0 meters/second at the start.
Therefore, After 1 second, it will have a velocity of 2 meters/second, after 2 seconds it will have a velocity of 4 meters/second, after 3 seconds it will have a velocity of 6 meters/second, and so on. After 10 seconds, it will have a velocity of 20 meters/second.
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What is the frequency of a planet around a star in orbit at a mean distance of R, if it is twice the mean distance of a planet orbiting the same star with a frequency of 2.10 × 10^-5 rev/s?
A) 1.4 × 10^-5 rev/s
B) 7.4 × 10^-6 rev/s
C) 1.7 × 10^-7 rev/s
D) 6.8 × 10^-7 rev/s
E) 2.4 × 10^-8 rev/s
Pls show work so I can learn how you got to that answer. Thank you!
Answer:
A) 1.4 × 10^-5 rev/s
Explanation:
We can use Kepler's Third Law of Planetary Motion to solve this problem. Kepler's Third Law states that the square of the period of a planet's orbit is proportional to the cube of its average distance from the star.
T^2 = k * R^3
where T is the period of the orbit and R is the mean distance of the planet from the star. k is a constant of proportionality that depends on the mass of the star.
Let's assume that the frequency of the first planet is f1 and its mean distance from the star is R1. The frequency of the second planet is 2.10 × 10^-5 rev/s and its mean distance from the star is 2R1. We can relate the frequency of the orbit to the period of the orbit as follows:
f = 1/T
Using the first equation, we can find the period of the first planet:
T1^2 = k * R1^3
And the period of the second planet:
T2^2 = k * (2R1)^3
Now, we can substitute these equations into the equation for frequency:
f1 = 1/T1 = 1/sqrt(k * R1^3)
f2 = 1/T2 = 1/sqrt(k * (2R1)^3)
Finally, we can set f1 = 2f2 and solve for f1:
2f2 = 1/sqrt(k * R1^3)
f1 = 1/sqrt(k * R1^3) / 2
So, f1 = 1.4 × 10^-5 rev/s, which is the answer (A).
1) let's start by reviewing the connection between force and potential energy. how are these concepts conceptually linked? mathematically linked?
Potential energy is simply equal to force times the relative position of a mass.
Potential energy is defined to be the energy that is held by a mass due to its position relative to other masses, its electric charge, stresses within itself, or other factors. Since energy (work) is equal to force times displacement, both force and displacement must be linked to energy, including potential energy.
For example, a type of potential energy is gravitational potential energy, which is equal to force of gravity times the height. The height here is the relative position of the mass. (How far the mass is from h = 0 is the displacement of the mass.)
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it is possible to view the moon in first-quarter phase the day after a total lunar eclipse. group of answer choices true false
It is untrue that the day following a total lunar eclipse, one can see the moon in its first quarter phase.
Can you observe a lunar eclipse every full moon?Only a night with a full moon can have a lunar eclipse. However, because Planet's orbit around the sun and the moon's orbit around the earth are not in the same plane, they do not occur every full moon night. Only when the sun, the earth, and the moon align in a straight line can an eclipse occur.
What phase of the Moon must be present for a lunar eclipse to occur?Only under a full moon and when the Moon travels entirely or partially through Earth's shadow can there be a lunar eclipse.
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write a 200 to 300 word conclusion discussing your results and the relationships between positions velocity and acceleration and how calculus can allow us to find position from velocity
The relationships between positions velocity and acceleration is velocity function and that the indefinite integral of the velocity represents the distance function when studying the relationship between the derivative and the indefinite integral as inverse operations.
In situations requiring distance, velocity, and acceleration—each of which is a function of time—the indefinite integral is frequently used. The derivative of a distance function represents immediate velocity, while the derivative of a velocity function represents instantaneous acceleration at a specific moment, as noted in the discussion of derivative applications. Remember that the indefinite integral of the acceleration function represents the velocity function and that the indefinite integral of the velocity represents the distance function when studying the relationship between the derivative and the indefinite integral as inverse operations.
A measure of how velocity varies is acceleration. It should come as no surprise that we can determine acceleration by taking the derivative of the velocity function as velocity is a measure of how position changes. Since we can determine velocity by taking the derivative of the position function.
A curved position graph will have a changing slope, which also indicates a changing velocity. Acceleration implies a change in velocity. Therefore, a graph's curvature indicates that an object is accelerating and changing velocity or slope.
The velocity-time graph displays how quickly you moved, while the position-time graph displays how far you've come. The points on the velocity-time graph are determined by the rate of change of the position-time graph.
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a human expedition lands on an alien moon. one of the explorers is able to jump a maximum distance of 14.5 m with an initial speed of 3.10 m/s. find the gravitational acceleration on the surface of the alien moon. assume the planet has a negligible atmosphere. (enter the magnitude in m/s2.)
The gravitational acceleration on the surface of the alien moon can be calculated using the equation g = (2Ru2)/(R2 + u2), where R is the maximum jump distance (14.5 m), and u is the initial speed (3.10 m/s). Plugging these values in, we get g = 0.5137 m/s2.
Using this equation, we can calculate the gravitational acceleration on any other alien moon, as long as we know the maximum jump distance and the initial speed. For example, if the maximum jump distance is 18 m and the initial speed is 3.50 m/s, then the gravitational acceleration would be 0.6115 m/s2.
Additionally, if the initial speed is increased, the gravitational acceleration increases as well. This is because the equation takes into account the kinetic energy of the object, which increases as the velocity increases.
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how fast must a plane fly along the earth's equator so that the sun stands still relative to the passengers? the earth's radius is 6400 km k m . part a give your answer in km/h k m / h .
The earth's radius is 6400 km. The plane must fly at a speed of approximately 464.8 km/h along the earth's equator for the sun to appear stationary to the passengers.
The speed of the plane required to make the sun appear stationary to the passengers is known as the Synchronous Orbital Speed. It can be calculated using the following formula:
V = (2 . pi . R) / T
where,
V = the orbital speed
pi = approximately equal to 3.14
R = the radius of the earth (6400 km)
T = the time it takes for the earth to complete one rotation around its axis, which is 24 hours or 86,400 seconds.
Substituting the values in the formula, we get:
V = (2 . pi . 6400 km) / 86,400 s
V = (2 . pi . 6400 km) / 86,400 s . 3600 s/h
V = (2 . pi . 6400 km) / 24 h
V = (2 . pi . 6400 km) / 24 h = 464.8 km/h
So, the plane must fly at a speed of approximately 464.8 km/h along the earth's equator for the sun to appear stationary to the passengers.
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If the radius of earth 6400 km, the plane must fly along the earth's equator so that the sun stands still relative to the passengers with velocity:
A. 1675.51 km/h
B. 1041.11 mph
C. The aircraft must fly from east to west.
The formula used to explain the relationship between speed/ velocity, distance, and time is speed distance time.
That is speed = distance / time. Alternatively, you can calculate the time by dividing the distance traveled by the speed.
The circumference of the earth = 2[tex]\pi[/tex]r
= 2 (3.14) (6400)
= 12800[tex]\pi[/tex]km
Hence, the speed of the plane:
Speed = distance / time
= 12800[tex]\pi[/tex]km / 24 hr
= 1675.51 km/h
Convert to mph:
= 1041.11 mph
C. The plane must fly from east to west.
The question is incomplete, it should be:
How fast must a plane fly along the earth's equator so that the sun stands still relative to the passengers? Give your answer in both km/h and mph. The radius of the earth is 6400 km.
part A km/h
part B mph
Part C In which direction must the plane fly, east to west or west to east?
Express your answer using two significant figures.
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How to do physcis?
Please answer correctly
Physics is a challenging field that requires perseverance and a strong work ethic, but it can also be incredibly rewarding as you learn about the fundamental laws of the universe and how they govern our world.
What is physics?Physics is a natural science that studies matter, energy, and their interactions in the physical universe.
Physics is the study of matter and energy and their interactions in the physical universe. To study physics, you need to:
Develop a strong foundation in mathematics, especially calculus, as physics often involves mathematical modeling and problem-solving.Acquire a basic understanding of the key concepts, including mechanics, thermodynamics, electromagnetism, and quantum mechanics.Read and understand physics textbooks, articles, and research papers.Engage in hands-on experimentation and observation, either in a lab or through computer simulations.Practice solving problems and working through physics examples to deepen your understanding.Collaborate with others, including teachers, mentors, and classmates, to gain new perspectives and learn from others.Learn more about physics here:
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what's the total spring constant of springs in parallel and in series? show this by deriving the equations
Whenever two massless springs that obey Hooke's Law are joined by a thin, vertical rod, they are linked in parallel. The spring constants for springs and were indeed denoted by 1 and 2 . A steady force F is applied to the rod, keeping it perpendicular to the force's orientation. If the force was reciprocated, the springs may likewise be squeezed.
Such a system of two parallel springs is equal to a single Hookean spring with spring constant k.
What is spring constant?
A nanocantilever's spring constant (stiffness) changes with its characteristic linear size, l, and mass, m. With a result, the vibration's resonance frequency changes as v. This guarantees a quick response because nanomechanical devices are actually very rigid.To know more about spring constant, click the link given below:
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determine the horsepower developed by a passenger car traveling at a speed of 50-mi/h on an upgrade of 5% with a smooth pavement. the weight of the car is 4,500-lb and the cross-sectional area of the vehicle is 50 square-feet.
Passenger car requires 21.23 horsepower to travel at a speed of 50-mi/h on an upgrade of 5% with a smooth pavement, given its weight of 4,500-lb and cross-sectional area of 50 square-feet.
The horsepower developed by the passenger car, we need to calculate the force required to overcome the resistance of the car on the upgrade, and then use that force to calculate the power required in horsepower.
[tex]Force = Weight * Grade + Drag[/tex]
First, we calculate the force required to overcome the resistance of the car on the upgrade:
where:
Weight = 4,500 lb
Grade = 5% = 0.05
Drag = 0.5 * Air Density * Velocity^2 * Coefficient of Drag * Cross-Sectional Area
[tex]Drag = 0.5 * Air Density * Velocity^2 * Coefficient of Drag * Cross-Sectional Area[/tex]
[tex]Air Density =[/tex][tex]0.075 lb/ft^3[/tex]
[tex]Velocity = 50 mph[/tex]
[tex]Coefficient of Drag = 0.35[/tex]
[tex]Drag =[/tex][tex]0.5 * 0.075 * (50/3600)^2 * 0.35 * 50 = 8.53 lb[/tex]
[tex]Force = 4,500 * 0.05 + 8.53 = 233.53 lb[/tex]
Next, we calculate the power required in horsepower:
[tex]Power (HP) = Force * Velocity / 550[/tex]
[tex]Velocity = 50 mph[/tex]
[tex]Power (HP) = 233.53 * 50 / 550 = 21.23 HP[/tex]
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in astronaut simulation training, a 5.00 m long horizontal arm spins around like a centrifuge. what velocity would be needed to have the trainee experience 5 g's of acceleration?
The velocity needed to have the trainee experience 5 g's of acceleration is approximately 15.74 m/s.
What is the acceleration ?
Acceleration is the rate of change of velocity of an object over time. The SI unit of acceleration is meters per second squared (m/s2). Acceleration can be positive, negative, or zero. Positive acceleration means the object is speeding up, negative acceleration indicates the object is slowing down, and zero acceleration indicates the object is not changing speed or direction.
The acceleration experienced by an object moving in uniform circular motion is given by:
[tex]\mathbf{a = v^2 / r}[/tex]
where a is the acceleration, v is the velocity, and r is the radius of the circular path.
In this case, we want the trainee to experience an acceleration of 5 g's, which is 5 times the acceleration due to gravity
(g) = 5 × 9.81 m/s²
= 49.05 m/s²
The radius of the circular path is half the length of the horizontal arm, or
r = 5.00m/2
= 2.50 m.
Substituting these values into the equation for acceleration, we get:
49.05 m/s² = v² / 2.50 m
Solving for v, we get:
[tex]\mathrm{v = \sqrt{49.05 m/s^2 \times 2.50 m} }[/tex]
v = 15.74 m/s
Therefore, the velocity needed to have the trainee experience 5 g's of acceleration is approximately 15.74 m/s.
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why does a blue star and red star able to have the same luminosity??
If a reddish and a bluish star have the same luminosity, then the reddish star must be larger than the bluish star. This is again due to the Stefan-Boltzmann law; since the cooler, red star must have more surface area than a hot blue star to produce the same luminosity.
an electric field of is desired between two parallel plates, each of area and separated by 2.45 mm of air. what charge must be on each plate?
To calculate the charge on each plate, you need to use the equation for capacitance, which is C = εA/d, where ε is the permittivity of air, A is the area of the plate, and d is the distance between the two plates.
In this case, the permittivity of air is 1.0006, the area of the plate is 45 cm2, and the distance between the two plates is 2.45 mm. Plugging in these values, the capacitance is 2.79108xC. This means that each plate must be charged with a charge of 1.39554xC in order to achieve the desired electric field.
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1.in an rc series circuit, the source voltage is vs, the voltage across the resistor is vr, and the voltage across the capacitor is vc. according to kirchoff's loop rule, what is the relationship between these voltages?
The relationship between these voltages vs = vr + vc. In an RC series circuit, the total voltage across all components in the circuit must equal the source voltage, according to Kirchhoff's loop rule.
In an RC series circuit, the total voltage across all components in the circuit must equal the source voltage, according to Kirchhoff's loop rule. Therefore, the relationship between the source voltage (vs), the voltage across the resistor (vr), and the voltage across the capacitor (vc) can be expressed as follows:
vs = vr + vc
This equation states that the sum of the voltages across the resistor and the capacitor must equal the source voltage in order to satisfy the law of conservation of energy in the circuit. The relationship between these voltages vs = vr + vc. In an RC series circuit, the total voltage across all components in the circuit must equal the source voltage, according to Kirchhoff's loop rule.
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the total number of stars in the observable universe is roughly equivalent to group of answer choices the number of grains of dry sand on all the beaches on earth the number of grains of dry sand on miami beach infinity the number of stars in the milky way galaxy
The star in the observable cosmos is about equal to: A) The amount of sand grains on all of Earth's beaches
What sort of things are stars?
A star is formed in an enormous gas cloud. The sky's temperature is too moderate for the creation of molecules. The Delta haze groups in the Orion galaxy are stars in this stage of development. 2. Protostar When gas particles hit in the solar nebula, heat energy is produced.
The Sun is a star, but why?
The energy and light provided by the sun, which is actually a star, are essential in maintaining all life on earth. Nuclear fusion events that take place inside stars are what give them their light. A byproduct of this process, which turns hydrogen into helium, is energy. This energy is what manifests as light for humans.
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two parallel plates, separated by 0.20 m, are connected to a 12-v battery. an electron released from rest at a location 0.10 m from the negative plate. when the electron arrives at a distance 0.050m from the positive plate, how much kinetic energy does the electron gain?
The electron gains 4.8 x 10^-17 J of kinetic energy when it arrives at a distance of 0.050 m from the positive plate.
The potential difference (V) between the two plates is equal to the voltage of the battery, so V = 12 V. The electric field (E) between the two plates is given by E = V/d, where d is the separation distance between the plates. So, the electric field between the plates is E = 12 V / 0.20 m = 60 N/C.
The change in potential energy of the electron as it moves from 0.10 m to 0.050 m from the negative plate can be calculated as ΔU = qΔV, where q is the charge of the electron and ΔV is the change in potential. The change in potential can be calculated as ΔV = Ed, where d is the change in the distance between the electron and the plate. So,[tex]ΔU = qE(0.10 m - 0.050 m) = qE(0.05 m).[/tex]
The change in potential energy is equal to the change in kinetic energy, so ΔK = ΔU. The final kinetic energy (Kf) of the electron can be calculated as [tex]Kf = ΔK = ΔU = qE(0.05 m) = (1.6 x 10^-19 C)(60 N/C)(0.05 m) = 4.8 x 10^-17 J[/tex].
Therefore, the electron gains [tex]4.8 x 10^-17 J[/tex] of kinetic energy when it arrives at a distance of 0.050 m from the positive plate.
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how much work does the electric field do in moving a proton from a point at a potential of to a point at ? express your answer both in joules and electron volts.
The work done by the electric field in moving a proton from a point at 0 V to a point at 100 V is 1.602 × 10⁻¹⁷J or 100 eV.
What moves a charge when an electric field is present?
Charges in an electric field need to work their way around through some form of labour. In order to marginally counteract Q's repulsive force, we apply a force to it. Now let's fix this: The formula W = F·d states that the amount of labour is equal to the product of the force and the distance.
To find the work done by the electric field in moving a proton from one point to another, we can use the formula:
W = qΔV
where W is the work done, q is the charge of the particle (in this case, the charge of a proton, which is 1.602 x 10⁻¹⁹ C),
Assuming that the potential at the initial point is V1 = 0 V, and the potential at the final point is V2 = 100 V, we have:
ΔV = V2 - V1 = 100 V
W = (1.602 x 10⁻¹⁹ C) × (100 V) = 1.602 × 10⁻¹⁷ J
To express this answer in electron volts, we can use the conversion factor:
1 eV = 1.602 x 10⁻¹⁹ J
Dividing the work done by this conversion factor, we get:
[tex]$\mathrm{W = \frac{(1.602 \times 10^{-17} J)}{(1.602 \times 10^{-19 }J/eV)} = 100 eV}[/tex]
Therefore, the work done by the electric field in moving a proton from a point at 0 V to a point at 100 V is 1.602 × 10⁻¹⁷J or 100 eV.
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Calculate the linear expensitivity of length 120m that assumed a new length of 120.0 on when heated through a temperature 100°c
Answer:
0
Explanation:
The linear expansivity of a material is the fractional increase in length for a unit increase in temperature. To calculate linear expansivity for a length of 120m that assumed a new length of 120.0 when heated through a temperature of 100°C, you would use the following formula:
Linear Expansivity = (New Length - Original Length) / (100°C - 0°C)
Therefore, the linear expansivity of the material in this example would be:
Linear Expansivity = (120.0 - 120.0) / (100°C - 0°C)
Linear Expansivity = 0.
Answer:
The linear expansivity of length 120m when heated through a temperature of 100°C can be calculated by using the following equation: ΔL/L × (1 / T) = α, where ΔL is the change in length, L is the original length, T is the temperature and α is the linear expansivity. In this case, ΔL would be 0, as the original and new length are the same. Therefore, the linear expansivity of length 120m when heated through a temperature of 100°C is 0. Here is a Brainly link that can provide you with more information on linear expansivity: https://brainly.com/question/5861312.
when temperature inversions work to trap pollution ?
The warmer air rises and acts as a lid, trapping the colder air near the ground. The air layer closest to the ground becomes more and more polluted as a result of pollution, including that from traffic, being trapped. This continues until the current meteorological conditions change.
What is temperature ?
Temperature is a unit used to represent how hot or cold something is. It can be stated using the Celsius or Fahrenheit scales, among others. Temperature shows which way heat energy will naturally flow, i.e., from a hotter (body with a higher temperature) to a colder (body with a lower temperature) (one at a lower temperature).
What is pollution ?
The release of dangerous substances into the environment is referred to as pollution. Pollutants are these dangerous materials. Natural substances like volcanic ash are examples of pollutants. They may also be the result of human activity, such as the production of factory runoff or waste.
In a temperature inversion, the warmer air serves as a lid, keeping pollutants close to the ground and preventing them from dispersing until the weather changes. The chemicals consequently pose a significant threat to human health by reacting with one another to create other pollutants like ground-level ozone.
Therefore, Temperature inversions work to trap pollution is mentioned above.
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the x component of vector is 25.0 m and the y component is 40.0 m. (a) what is the magnitude of ? (b) what is the angle between the direction of and the positive direction of x?
(a) The angle between the direction of and the positive direction of x is 60⁰.
(b) The magnitude of the vector is 47.2 m.
What is the angle between the two vectors?
The angle between the two vectors is calculated by applying the following formula as shown below.
θ = arc tan ( Vy / Vx )
where;
Vx is the horizontal component of the velocityVy is the vertical component of the velocityθ = arc tan ( 40.0 / 25.0 )
θ = arc tan ( 1.6 )
θ = 60⁰
The magnitude of the vector is calculated as;
V = √ ( 25² + 40² )
V = 47.2 m
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you are testing a jet back pack on a dummy. you start it rising with an upward acceleration of 3 m/sec/sec. after 9 seconds the jetpack fails (upward acceleration stops, gravity takes over). how fast is the dummy moving when it hits the ground?
The dummy was moving at a velocity of approximately 93 m/s (or 335 km/h) just before hitting the ground.
Find the velocity of the dummy when the jetpack fails,
v = u + at
where v is final velocity, u is initial velocity (which is 0 m/s in this case), a is acceleration (which is 3 m/s^2 in the upward direction), and t is time (which is 9 seconds).
v = 0 + (3 m/s^2)(9 s) = 27 m/s
Distance traveled,
s = (1/2)at^2
s = (1/2)(-9.8 m/s^2)(9 s)^2
s = -441 m (taking upward direction as positive)
Here, we have taken the upward direction as positive and the negative value of s indicates that the dummy fell a total distance of 441 meters after the jetpack failed.
v^2 = 0 + 2(-9.8 m/s^2)(-441 m)
v^2 = 8623.6 m^2/s^2
v = 93 m/s (approx)
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how do the energies of a flowing fluid and a fluid at rest compare? name the specific forms of energy associated with each case. (3 points)
The other response gave a description of the kinetic energy from flowing liquids. However, the energy or liquid at rest is not empty. the same concept as the potential energy underlying solids. Both can be converted into kinetic energy.
What precisely is kinetic energy?An object's kinetic energy is the power it has as a result of motion. It is described as the effort required to move a mass-based body from rest to the indicated velocity. The body holds onto the kinetic energy it acquired during its acceleration, unless its speed changes.
Who made the discovery of kinetic energy?The idea of kinetic energy was first proposed in 1849 by William Thompson, later known as Lord Kelvin. We now relate the idea of an object's kinetic energy with the quantity of one half of its mass multiplied by its velocity squared.
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