The equilibrant force is 45 N, acting in the direction opposite to the net force.
What is meant by equilibrant force?The equilibrant force is the force that is required to balance all other forces acting on an object in a specific situation. To find the equilibrant force for the given forces, you need to determine the net force acting on the object.
The net force can be found by adding the individual forces acting on the object:
Net force = 53 N + 28 N - 12 N - 24 N = 45 N
Equilibrant force = - 45 N = 45 N, acting in the opposite direction of the net force.
In this case, the equilibrant force is 45 N, acting in the direction opposite to the net force.
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The radial component of acceleration of a particle moving in a circular path is always.
The radial component of acceleration of a particle moving in a circular path is always directed towards the center of the path.
What is the meaning of acceleration?
The rate at which velocity changes is called acceleration. Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.
Acceleration occurs in the direction of the velocity change, which is the same direction that the circular path's center of rotation points. The centripetal acceleration typically has a negative sign in vector form. This is due to the centripetal acceleration, which is along the radius vector pointing toward the center of the circular motion, being in the opposite direction to that of the radius vector.
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a cart is moving horizontally with a constant acceleration. inside the cart there is a steel ball suspended by two cords a and b. if the tension in a is twice as that in b, what is the acceleration of the cart?
The acceleration of a cart with a steel ball suspended by two cords are 1/3√3 g.
Please refer to the attached picture below.
From the picture, we know that:
m = steel ball m
Θ = 60°
TA = tension cord A
TB = tension cord B
TA = 2TB
a = cart acceleration
First, we need to draw and define every forces working on the system. Note that the ball is in its static position on its y-axis and only moves on the x-axis.
We will focus on the y-axis first. Since there is no movement on the y-axis, we will use Newton's First Law, where:
∑F = 0
TAy + TBy - m.g = 0
TAy + TBy = m.g
TA sin Θ + TB sin Θ = m.g
2TB sin Θ + TB sin Θ = m.g
3 TB sinΘ = m.g
3 TB sin 60° = m.g
3TB (√3/2) = m.g
TB = 2m.g/3√3 ... (i)
Next, we will focus on the x-axis. Since there is an acceleration on the x-axis, hence we will use Newton's Second Law where:
∑F = m.a
TAx - TBx = m.a
TA cos Θ - TB cosΘ = m.a
2TB cosΘ - TB cosΘ = m.a
TB cosΘ = m.a
2m.g/3√3 (cos 60°) = m.a
2m.g/3√3 (1/2) = m.a
a = 1/3√3 g
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A cargo container is 25 ft long, 10 ft tall, and 12 ft wide. Find its volume in cubic yards.
The volume of a 25 ft x 10 ft x 12 ft cargo container is 111.1 cubic yards (3000 cubic feet divided by 27).
Volume is the three-dimensional space occupied by an object or a substance. It is the measure of the amount of space an object takes up and is typically expressed in units such as cubic centimeters, cubic meters, cubic feet, or cubic yards.
The volume of the cargo container can be found by multiplying its length, width, and height:
V = 25 ft × 10 ft × 12 ft = 3000 ft³
To convert from cubic feet to cubic yards, divide by 27:
Volume calculation: 111.1 yd³ = (3000 ft³ / 27).
So the volume of the cargo container is 111.1 cubic yards.
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what is larry's average velocity, in m/min , during each of these two intervals. express your answers in meters per minute and separated by a comma.
To calculate Larry's average velocity during two intervals, we need information on his displacement (change in position) and time during those intervals. The average velocity is given by the formula:
v = Δx / Δt
where Δx is the displacement and Δt is the time.
Without knowing the specific values for Δx and Δt, it is not possible to calculate Larry's average velocity during each of the two intervals.
It is important to note that velocity is a vector quantity that includes both magnitude and direction. The displacement Δx must be in the same direction as the velocity, while the time Δt must be positive.
If the direction of motion changes during the interval, then the average velocity will be different for each interval and will not necessarily be equal to the final velocity.
In conclusion, to calculate Larry's average velocity during two intervals, we need to know the displacement and time during those intervals. The formula for average velocity is given by v = Δx / Δt, where Δx is the displacement and Δt is the time. Without knowing the specific values for Δx and Δt, it is not possible to calculate Larry's average velocity.
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3. Where does the energy come from that drives water transport in plants?a) The sunb) ATPc) Waterd) Membrane pumps
The sun provides the energy that propels water transport in plants.
Photosynthesis is the process by which plants convert light energy into chemical energy that is stored in glucose. This glucose is converted into ATP (adenosine triphosphate), which serves as an energy source for various metabolic processes in the plant, including water transport.
Water is absorbed by the plant's roots and transported upward through the stem and leaves via a process known as transpiration. This process is powered by ATP, which provides the energy required to drive water movement from the roots to the rest of the plant.
So the sun provides the energy for water transport in plants, which is converted into chemical energy through photosynthesis and stored in the ATP.
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the plate was heating the beaker at constant rate
Despite the steady supply of heat, the temperature doesn't change once the melting process starts. This is due to the fact that the energy received and emitted during melting are equal. As a result, no change in temperature is noted.
We can mass only the anhydrous salt if the water of hydration has been completely driven off during heating to constant mass. A heated up in 2.1. The water molecules were more energetic and moved more quickly as the temperature rose, resulting in water molecules that are now farther distant from one another and a larger volume of water. Since the solid's attractive intermolecular forces are broken at the melting point rather than its kinetic energy being increased, the temperature remains constant.
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What happens when a positive and negative charge are near each other?
When a positive and negative charge are near each other, they will be attracted to each other and create an electrical force.
What is electrical force?Electrical force, also known as electrostatic force or Coulomb's law, is a type of physical force that exists between two charged particles. It is an attractive or repulsive force between two electrical charges that is created by an electric field. The force is proportional to the product of the two charges and decreases with the distance between them. Electrical force is one of the four fundamental forces of nature and is responsible for the attraction and repulsion of particles with an electric charge. It is the force that holds atoms together, and governs the behavior of charged particles in electric and magnetic fields. Electrical force is an integral part of the electromagnetic force, which is responsible for the creation and transmission of light, heat, and other forms of energy.
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two particles, an electron and a proton, are initially at rest in a uniform electric field of magnitude 490 n/c. if the particles are free to move, what are their speeds (in m/s) after 50.0 ns?
The speed of the electron is 4.302 x 10^6 m/s and the speed of the proton is 2.34 x 10^3 m/s after 50.0 ns.
The speed of a charged particle in an electric field can be calculated using the equation:
v = eE * t / m
where v is the speed of the particle, E is the electric field strength, t is the time, and m is the mass of the particle.
The electric field is a vector field that represents the force per unit charge at any point in space due to an electric charge distribution. It can be defined mathematically as E = F/q, where E is the electric field, and F is the force exerted on a charge q placed in the field.
The electric field is a fundamental concept in electromagnetism and is used to describe the behavior of electric charges and the interaction between charged objects.
For an electron, the mass is approximately 9.11 x 10^-31 kg, and for a proton, the mass is approximately 1.67 x 10^-27 kg.
Given that the electric field strength is 490 n/C, the time is 50.0 ns (which is equivalent to 50.0 x 10^-9 s), and the masses of the electron and proton, we can calculate their speeds as follows:
Speed of electron =1.6 x 10^-19 x 490 x 50 x 10^-9 / (9.11 x 10^-31) = 4.302 x 10^6 m/s
Speed of proton = 1.6 x 10^-19 x 490 x 50 x 10^-9 / (1.67 x 10^-27) = 2.34x 10^3m/s
To the nearest m/s, the speed of the electron is 4.302 x 10^6 m/s and the speed of the proton is 2.34 x 10^3 m/s after 50.0 ns.
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1. A 1. 4 x 103kg car is westbound at a velocity of 37. 0 km/h when it collides with a
2. 0 x 10kg truck northbound at a velocity of 35 km/h. If these two vehicles lock
together upon collision, what is the initial velocity of the vehicles after collision?
To determine the initial velocity of the vehicles after the collision, we need to find the momentum of each vehicle before the collision and the total momentum after the collision.
The momentum of the car before collision = mass x velocity
= 1.4 x 103 kg x 37.0 km/hr
= 52.18 x 103 km/hr
The momentum of the truck before collision = mass x velocity
= 2.0 x 10 kg x 35 km/hr
= 70.0 x 10 km/hr
Total momentum before collision = momentum of car + momentum of the truck
= 52.18 x 103 kgm/hr + 70.0 x 10 km/hr
= 52.25 x 103 km/hr
After the collision, the two vehicles lock together and form a combined mass of (1.4 x 103 kg) + (2.0 x 10 kg) = 3.4 x 103 kg
Initial velocity after collision = total momentum / combined mass = 52.25 x 103 kgm/hr / 3.4 x 103 kg = 15.37 km/hr
Therefore, the initial velocity of the vehicles after the collision is 15.37 km/hr.
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show that the coefficient of profile drag is cd = 0.0088. assume you can use the value for a flat plate with a correction factor of 1.75.
In aerodynamics, the coefficient of profile drag (Cd) for a flat plate is a frequently used reference measure, and its value depends on the flow circumstances. Cd values for flat plates typically vary from 0.0015 to 0.0050. This value is corrected by a correction factor of 1.75 to account
A dimensionless integer called the coefficient of profile drag (Cd) is used to measure the aerodynamic resistance of an object moving through a fluid, most often air. It is the proportion of the drag force exerted on an item to the dynamic fluid coefficient and the object's reference area. The form, size, direction, and speed of the item, together with the fluid characteristics and flow conditions, all affect the value of Cd. An item with a low Cd value is more aerodynamically efficient, producing less drag and encountering less resistance as it moves through the fluid. On the other side, an item with a high Cd value will produce more drag and be less aerodynamically effective. The Cd rating
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A loudspeaker on a tall pole broadcasts sound waves equally in all directions. What is the speaker's power output if the sound intensity level is 108 dB at a distance of 17m?
So the speaker's power output is approximately 2773.99 watts.
The power output of a speaker can be calculated from the sound intensity level and distance using the equation:
P = 10^(I/10) / (4 * pi * d^2)
where P is the power output in watts, I is the sound intensity level in dB, and d is the distance in meters. Substituting the given values, we get:
P = 10^(108/10) / (4 * pi * 17^2)
P = 10^10.8 / (4 * pi * 289)
P = 3162277.7 / (4 * pi * 289)
P = 3162277.7 / 1140
P = 2773.99 W
A motor's output power is calculated by multiplying its torque output by the angular velocity of its output shaft. The power lost by an electrical component in a circuit is also a function of the voltage across the component and the current that flows through it.
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a jogger on a circular track that has a radius of 0.250 km runs a distance of 1.00 km. what angular distance does the jogger cover in (a) radians and (b) degrees?
The radius of the circle (r)=0.25 kmLInear distance (S)=1 km(a)Now the angular distanceθ=Srθ=10.25θ=4 rad(b)Now,π rad=180∘1 rad=180π∘Thereforeθ=(4 rad)180∘π radθ=229.183∘
What is 200 pounds to kg?
90.72 kilograms are equal to 200 pounds.A kilogram weighs 90.718474 pounds. The United States of America and the British commonwealths typically measure weight in pounds.
What's a pound?The imperial and American customary systems of measurement both use the pound as a weight or mass unit. It is typically abbreviated as "oz" for the troy or apothecary pound and "lb" for the avoirdupois pound. 16 ounces, 7,000 grains, or 0.45 kilograms make up one pound. It is frequently utilized for weighing meats, fruits, vegetables, and other foods. The pound is also used as a currency in the United Kingdom.
Evaluating :90.72 kilograms are equivalent to 200 pounds.
Divide the number of pounds by 2.2 to make the conversion from pounds to kilograms.
This is because 2.2 pounds are equivalent to 1 kilogram.
Therefore, 90.72 kg is the result of 200 divided by 2.2.
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why does temperature typically increase with height in the stratosphere?
Answer: It increase because THE OZONE LAYER ABSORBS THE GREATER PART OF THE SOLAT ULTRAVIOLET RADIATION.
Explanation:
What is 52 degrees Celsius in Fahrenheit?
52 degrees Celsius in Fahrenheit is 125.6 Fahrenheit. Temperature conversion from Celsius to Fahrenheit is done by, multiplying by 1.8 (or 9/5) and add 32.
What is Temperature?
Temperature, like any other physical quantity, is defined as the measurement of a substance's or object's warmth or coldness in relation to some standard value. While it is used to express hot and cold conditions, temperature is usually measured with a thermometer that is marked in several temperature scales, the most common of which are Celsius and Fahrenheit. There are several other temperature units.
What is SI Unit of Temperature?
According to the International System of Units, the SI unit of temperature is Kelvin, which is represented by the symbol K. In the fields of science and engineering, the Kelvin scale is widely accepted or used. However, in most parts of the world, temperature is measured using the Celsius or Fahrenheit scale.
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A pendulum has its greatest velocity at the bottom of its swing. At that point, its speed is contant (it is neither accelerating nor decelerating). Draw a diagram to show why there is no acceleration at that point. Explain in terms of the pendulum's energy and the forces acting on it.
A basic pendulum consists of a large object suspended from a fixed support by a string.
What is Pendulum?It usually hangs vertically when it is in equilibrium. The pendulum bob is the loving name for the large object. The bob starts vibrating back and forth about its fixed equilibrium point when it is pulled out of equilibrium and subsequently released.
The motion is periodic because it is regular and keeps repeating. In an earlier section of this lesson, we discussed pendulum motion in an effort to better grasp how vibrating things work.
We revisited the topic of the oscillation of a pendulum while examining the mathematical characteristics of periodic motion.
Therefore, A basic pendulum consists of a large object suspended from a fixed support by a string.
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Entropy Balance In Closed System Definition
The entropy balance in a closed system refers to the change in the entropy (a measure of the amount of thermal energy in a system that is unavailable for doing useful work) of the system over time.
How is the entropy balance expressed?In a closed system, the entropy can only change due to energy transfer as heat and work, and the entropy balance is expressed as the rate of entropy generation within the system plus the rate of entropy transfer into the system, minus the rate of entropy transfer out of the system. The entropy balance equation is used to assess the efficiency of thermodynamic processes and to determine the maximum useful work that can be obtained from a system.
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the maximum velocity attained by the mass of a simple harmonic oscillator is 10 cm/s, and the period of oscillation is 2 s. if the mass is released with an initial displacement of 2 cm, find (a) the amplitude, (b) the initial velocity, (c) the maximum acceleration, and (d) the phase angl
If the mass is released with an initial displacement of 2 cm then:
(a) the amplitude = 0.03184
(b) the initial velocity = 0.7779 m/s
(c) the maximum acceleration = -0314 m/s²
(d) the phase angle = -51.087°
What is acceleration?The pace at which speed changes is known as acceleration. Acceleration typically, but not always, indicates a change in speed. Because the direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.
What is velocity?The most important metric for determining an object's position and rate of movement is its velocity. The distance that an object travels in a certain amount of time might be used to define it. The object's displacement in a unit of time is referred to as velocity.
[tex]$$Solution) Maximum Velocity, $v=10 \mathrm{~cm} / \mathrm{s}$ $1 \mathrm{~cm} / \mathrm{s}=0.01 \mathrm{~m} / \mathrm{s}$$$\begin{aligned}& v=10 \times 0.01 \mathrm{~m} / \mathrm{s} \\& \mathrm{v}=0.10 \mathrm{~m} / \mathrm{s}\end{aligned}$$Period of oscillation, $\mathrm{T}=2 \mathrm{~s}$Initial displacement, $x=2 \mathrm{~cm}$$1 \mathrm{~cm}=0.01 \mathrm{~m}$$$\begin{aligned}& x=2 \times 0.01 \mathrm{~m} \\& x=0.02 \mathrm{~m}\end{aligned}$$[/tex]
[tex]$$(a) Amplitude, $A=$ ?$$\begin{aligned}& \mathrm{v}=\mathrm{A} \omega \\& \omega=\frac{2 \pi}{\mathrm{T}}=\frac{2 \pi}{2}=\pi=3.14 \\& \mathrm{v}=\mathrm{A} \omega \\& 0.1=\mathrm{A}(3.14) \\& \mathrm{A}=\frac{0.1}{3.14} \\& \mathrm{~A}=0.03184\end{aligned}$$[/tex]
[tex]$$(b) Initial velocity, $\mathrm{u}=$ ?$$\begin{aligned}& \mathrm{u}=-\omega \mathrm{A} \sin (\omega \mathrm{t}-\phi) \\& \mathrm{At}, \mathrm{t}=0 \\& \mathrm{u}=-\omega \mathrm{A} \sin (0-\phi) \\& \mathrm{u}=-\omega \mathrm{A} \sin (-\phi)\end{aligned}[/tex][tex]$$We need to find phase angle$$\\\begin{aligned}& \mathrm{x}=A \cos (\omega \mathrm{t}-\phi) \\& \text { At } \mathrm{t}=0 \\& 0.02=0.03184 \cos (-\phi) \\& \phi=-{A_{cos}\left(\frac{0.02}{0.03184}\right) \\& \phi=-51.087^{\circ} \\& \mathrm{u}=- \omega A \sin (-\phi) \\& \mathrm{u}=-3.14 \times 0.03184 \times \sin (-51.087) \\& \mathrm{u}=0.07779 \mathrm{~m} / \mathrm{s}\end{aligned}$$[/tex]
[tex]$$(c) Maximum acceleration, $\mathrm{a}=$ ?$$\begin{aligned}\mathrm{a} & =-\omega_2 . \mathrm{A} \\\mathrm{a} & =-(3.142)(0.03184) \\\mathrm{a} & =-0.314 \frac{\mathrm{m}}{\mathrm{s} 2}\end{aligned}$$(d) Phase angle,$$\phi=\text { ? }$$From part(b)$$\phi=-51.087^{\circ}$$[/tex]
Thus, If the mass is released with an initial displacement of 2 cm then:
(a) the amplitude = 0.03184
(b) the initial velocity = 0.7779 m/s
(c) the maximum acceleration = -0314 m/s²
(d) the phase angle = -51.087°
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What is 97.6 f to c ?
97.6°F to C = 36.4444°C
Calculation:
97.6°F = (97.6 - 32) × 5/9 = 36.4444°C
how is Farenheit defined?
Fahrenheit is a temperature scale used in the United States and a few other countries. It is based on the work of German physicist Daniel Gabriel Fahrenheit, who began his work in 1724. On the Fahrenheit scale, 0 degrees is the freezing point of a solution of brine made from equal parts of ice and salt, and 100 degrees is the temperature of the human body. Other important temperatures on the scale include 32 degrees, the freezing point of water, and 212 degrees, the boiling point of water. The Fahrenheit scale is still used in the United States today due to its familiarity to many American citizens.
Therefore, 97.6°F to C = 36.4444°C
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you are traveling by plane and reach cruising altitude, where the pilot says you are going 650.0 km/hr. you turn your laptop back on, and it takes 22.00 seconds to start up. how far have you traveled in this time?
Answer:
To determine the distance traveled in 22 seconds, we can use the formula:
distance = speed * time
First, we need to convert the speed from km/hr to m/s, which is the standard unit for measuring speed in physics.
1 km/hr = 1000/3600 m/s = 5/18 m/s
So, 650.0 km/hr = 650.0 * 5/18 m/s = 130.9 m/s
Next, we can calculate the distance traveled in 22 seconds:
distance = speed * time = 130.9 m/s * 22 s = 2860.8 m
So, the plane has traveled 2860.8 meters in 22 seconds.
Explanation:
*** CHANGE IN STATE CONDENSATION EVAPORATION MELTING FREEZING SUBLIMATION BOILING Enter text here Enter text here CHANGES IN STATE Fill in the blank areas on the chart with the correct information. WHAT HAPPENS? Enter text here Enter text here 60 Enter text here IS THERMAL ENERGY REMOVED OR ADDED? Enter text here Enter text here Enter text here Enter text here 100 81 Enter text here Enter text here 9 10 11 DESCRIBE THE KINETIC ENERGY OF PARTICLES AFTER THE CHANGE Enter text here Enter text Enter text here Enter text her Enter te 12 13 Enter text here Secondary Sparks 2020
The heat changes that occur in the various change of state processes are as follows:
CONDENSATION - heat is removed from the substanceEVAPORATION - heat is added to the substanceMELTING - heat is added to the substanceFREEZING - heat is removed from the substanceSUBLIMATION - heat is added to the substanceBOILING - heat is added to the substanceWhat is a change of state process?A change of state is the change of a substance from one physical state to another physical state, for example, from liquid to gas.
Matter undergoes physical changes as its condition changes. The chemical composition or physical characteristics of matter are unaffected by these reversible modifications. Melting, freezing, sublimation, deposition, condensation, and evaporation are a few of the processes that can change a substance's state.
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A) furthermore, the financial implications of organ cloning are astronomical and it is unlikely that such scientific breakthroughs will ever be affordable to the general public. B) the main advantage of cloning is the provision of a backup system for the vital organs. Also, by altering human genes, geneticists may be able to eradicate many genetic diseases. C) on such a contentious topic, with continuing advances in this scientific field, the arguments for and against will, no doubt, continue for the foreseeable future. D) cloning is a contentious issue but the debate is simple with people either in favour or against. E) turning to the argument against, cloning hampers genetic diversity. With a smaller gene pool we become less able to adapt. Some dictators have wanted to create a smaller gene pool and wipe out entire races.
C. Cloning is a highly controversial and complex topic that has attracted a great deal of debate and discussion.
There are many arguments both for and against cloning, and opinions are often deeply divided.
The financial implications of organ cloning are astronomical, which makes it unlikely that such scientific breakthroughs will ever be affordable to the general public.
On the other hand, the main advantage of cloning is the provision of a backup system for vital organs and the potential to eradicate many genetic diseases.
Despite the ongoing discussions, the arguments for and against cloning are likely to continue for the foreseeable future as scientific advances in the field continue.
While cloning holds great promise for the future, it is important to consider both the potential benefits and drawbacks carefully in order to make informed decisions.
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what orientation of the dipole has the greatest electric potential energy?
When they are anti-parallel to one another, the dipole has the highest electric potential energy.
Think about a dipole with charges q1 = +q and q2 = -q that is set up in the same uniform electric field as in the previous figure. There is a gap between the charges, and the electric field's strength is E.
As shown in the figure, the charges' respective forces are given as -qE and +qE.
Knowing that a dipole experiences a torque equal to, which can be expressed as = p*E, when it is placed in a uniform electric field rather than a force,
Taking into account that the potential energy is located at the initial angle
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How high a hill can a car coast up (engine disengaged) if the work done by friction is negligible and its initial speed is 94 km/h?
The required height a car can coast up if the work done by friction is negligible and its initial speed is specified is calculated to be 33.90 m.
Initial speed of the car is given as 94 km/h.
We know that, 1 km/h = 0.277 m/s
So, u = 94 km/h = 94(0.277) = 26.038 m/s
Let the height gained by the car be h.
The final speed of the car will be zero at the height h.
v² = u²- 2 g h
So, v = 0 m/s
g = 10 m/s²
0² = 26.04²- 2 × 10 × h
20 h = 678.08
h = 33.90 m
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1. Hypothesis - formulate a hypothesis and create a strategy
2. Experiment - carry out the strategy, collect measurements
3. Analysis - draw graphs, evaluate the hypothesis
4. Report - document results
The scientific method is a systematic approach to solving problems in science. It involves formulating a hypothesis, designing experiments to test it, analyzing the data collected, and reporting the results.
The hypothesis is a testable assertion that foretells how an experiment will turn out. In order to collect data and test the theory, experiments are conducted. The data is then examined in order to make inferences and assess the hypothesis. Finally, the findings are presented in clear and plain terms to the scientific community.The scientific method is a methodical approach to problem-solving and decision-making in science. This is a general explanation of the process. It entails the following actions:
Create a verifiable hypothesis.Create and execute experiments to verify the theory.Analyze the information and make judgements.Deliver the results in a clear, succinct manner.you can learn more about hypothesis at:
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with what type of electromagnetic radiation would you observe: a star with a temperature of 5800 k? a gas heated to a temperature of one million k? a person on a dark night? electromagnetic radiation would you observe:
The type of electromagnetic radiation would be observed:
(a) a star with a temperature of 5800 K = the visible spectrum's green component.
(b) a gas heated to a temperature of one million K = the electromagnetic spectrum's X-ray component.
(c) a person on a dark night = the electromagnetic spectrum's infrared region.
Wien's law states that the wavelength in nanometers at which a blackbody emits the most energy is given by the relationship:
(a) λ max = b/T
Where,
λ max = wavelength (m)
b = = Wien's displacement constant (2.898 × 10⁻³ mK)
T = temperature (K)
Hence,
λ max = (2.898 × 10⁻³) / 5800
= 500 nm
(b)
One million = 1000.000 K
= 10⁶ K
λ max = (2.898 × 10⁻³) / (1 x 10⁶)
= 2.898 nm
(c) a person on a dark night:
Temperature of the human body = 37°C
= 37 + 273.15
= 310.15 K
λ max = (2.898 × 10⁻³) / 310.15
= 934 nm
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Problem 3 F3 Determine the magnitude and coordinate direction angles of so that the resultant of the three forces acts along the positive y axis and has a magnitude of 600 lb
To find the magnitude and direction of the third force such that the resultant of the three forces acts along the positive y-axis with a magnitude of 600 lb, you need to use vector addition.
Let's call the two given forces F1 and F2, and the third force F3. The y-component of the resultant is given by:
Fy = F1y + F2y + F3y = 600 lb
And the x-component of the resultant is given by:
Fx = F1x + F2x + F3x = 0 lb
So, to find F3, we need to determine its x and y components. The direction of F3 can be expressed in terms of its angle from the positive x-axis, denoted as θ. The x and y components of F3 can be found using trigonometry:
F3x = F3 * cos(θ)
F3y = F3 * sin(θ)
Now we have two equations and two unknowns, F3 and θ. Solving for F3:
F3 = sqrt(F3x^2 + F3y^2) = sqrt((F1x + F2x + F3x)^2 + (F1y + F2y + F3y - 600)^2)
And solving for θ:
θ = atan2(F3y, F3x) = atan2(F1y + F2y + F3y - 600, F1x + F2x + F3x)
Note that the atan2 function returns the angle in the range of -π to π, so you may need to adjust the angle to be in the range of 0 to 2π if necessary.
So, to summarize, to find the magnitude and direction of the third force, you need to determine the x and y components of the two given forces, set the x and y components of the resultant equal to zero and 600 lb respectively, solve for the third force, and then find its angle from the positive x-axis.
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QuestionWhich of the following assumptions regarding an ideal fluid flow holds true for which Bernoulli's principle is valid?ASteady-state flowBIncompressibleCNon-viscous flowDAll of these
Bernoulli's principle is valid for steady-state, incompressible, non-viscous fluid flow So option D is correct.
Bernoulli's principle states that as the speed of a fluid increases, its pressure decreases, and vice versa. This relationship is based on the conservation of energy in a fluid flow, where the sum of potential and kinetic energy remains constant along a streamline.
For Bernoulli's principle to hold true, certain assumptions must be made about the fluid flow:
Steady-state flow: The fluid flow must be steady, meaning that the fluid velocity and pressure at any given point must be constant over time.
Incompressible flow: The fluid must be incompressible, meaning that its density remains constant as it flows through a pipe or channel.
Non-viscous flow: The fluid must have a low viscosity, meaning that it experiences little friction as it flows.
These assumptions are necessary because Bernoulli's principle is based on the idea of a fluid flowing smoothly and without interruption. In real-world fluid flows, these assumptions are often only approximately true, and the principle must be adjusted accordingly. However, for many applications, the ideal fluid flow assumptions provide a useful starting point for understanding fluid behavior.
So, the correct answer is D) All of these.
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Give systematic names for the following formulas:(a) K[Pt(NH3)Cl5] (b) [Cu(en)(NH3)2][Co(en)Cl4] (c) [Pt(en)2Br2](ClO4)2
(a) The systematic name for the formula [tex]K[Pt(NH_{3})Cl_{5}][/tex] is potassium pentachloridoplatinum(II) ammine complex.
(b) The systematic name for the formula [tex][Cu(en)(NH_{3})_{2}] [Co(en)Cl_{4}][/tex] is diammine-ethylenediamminecopper(II)tetrachloroethylene-diamminecobaltate(II) complex.
(c) The systematic name for the formula [tex][Pt(en)_{2}Br_{2}](ClO_{4})_{2}[/tex] is bis(ethylenediamine)dibromoplatinum(IV) perchlorate complex.
The temporary name given to an undiscovered or recently synthesized chemical element is called a systematic element name. This name also has a systematic symbol attached to it. Only once its synthesis has been verified does a transuranic element in chemistry earn a permanent name and symbol.
Each substance has a name. This name should ideally include information about the compound's composition as well as possible characteristics. These names are known as systematic names and are founded on a set of guidelines created by IUPAC. All compounds have systematic names, but a lot of them also have trivial or popular names.
For instance lets take, the compound [tex][Cu(en)(NH_{3})_{2}] [Co(en)Cl_{4}][/tex],
Here,
[tex]NH_{3}[/tex] ,en are neutral ligand , Cl = -1
So, charge on copper =+2 and charge on Co = +2
Hence, the systematic name of the compound will be diammine-ethylenediamminecopper(II)tetrachloroethylene-diamminecobaltate(II)
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8. A statistician tells a coach that his team has a 32% chance of making it to the World Series. Which of these terms best describes their probability of making
it?
O A. Certain
OB.
Unlikely
O C. Likely
OD. Impossible
The term best describes their probability of making it Unlikely.
What is probability?Probability is a number that expresses the likelihood or chance that a specific event will take place. Both proportions ranging from 0 to 1 and percentages ranging from 0% to 100% can be used to describe probabilities.
Given, A statistician tells a coach that his team has a 32% chance of making it to the World Series.
Since,
Impossible means there's no chance that an event will happen. It will never happen. also denotes 0% probability.Unlikely means there's a small chance that an event will happen. also denotes 0 - 50% probability.Likely means there's a big chance that an event will happen. also denotes 50 - 100% probability.Certain means an event is going to happen, for sure. It will always happen. also denotes 100% probability.Thus in our case,
The term best describes their probability of making it Unlikely.
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