Suppose we are told that the acceleration of a particle moving in a circle of radius r withuniform speed v is proportional to some power of r, say r^n , and some power of v, say v^m , determine the powers of r and v
Your town is thinking about building a nuclear power plant. You will be asked to vote on it. Which source would provide the most reliable information about the safety of nuclear power plants?
Answer:
A). The nuclear regulatory commission.
Explanation:
I am taking the test rnn.
Flvs
Which statement best describes the effect of scientific advances on society?
A. They always have a positive impact on society.
B. They are inspired by the needs of society.
C. they do not affect society beyond the community level.
D. They always increase the cost of produce and technology.
The statement which best describes the effect of scientific advances on society is that they are inspired by the needs of society. Thus, the correct option for this question is B.
What is Scientific advancement?Scientific advancement may be defined as the generation or discovery of knowledge that advances the understanding of science or technology. It is also known as technological advancement. This mechanism stimulates when technologies or applied sciences become more precise, accurate, efficient, or more powerful or capable.
According to the context of this question, scientific advancement allows us to develop new technologies, solve practical problems, and make informed decisions both individually and collectively.
This is because its products are so useful, and the process of science is intertwined with those applications. This proves that it plays a major role in society. New scientific knowledge may lead to new applications.
Therefore, the correct option for this question is B.
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a 5.00 × 105 kg rocket is accelerating straight up. Its engines produce 1.50 × 107 of thrust, and air resistance is 4.50 × 106 N. What is the rocket’s acceleration?
The rocket’s acceleration is [tex]21m/s^2[/tex]
What is acceleration?Acceleration is the rate of change of the velocity of an object with respect to time. Acceleration is vector quantities as it has both magnitude and direction.
It is given by
[tex]a = \frac{v_f-v_0}{t}[/tex]
Where,
[tex]a =[/tex] average acceleration
[tex]v_f=[/tex] final velocity
[tex]v_0=[/tex] starting velocity
[tex]t =[/tex] elapsed time
What is Thrust?The force acting on an object perpendicular to the surface is called thrust. It is vector quantity and SI Unit of thrust is Newton.
[tex]\mathbf{T}=\mathbf{v} \frac{\mathrm{d} m}{\mathrm{d} t}[/tex]
Where,
[tex]T=[/tex] thrust
[tex]v=[/tex] velocity
[tex]dm=[/tex] change of mass
[tex]dt=[/tex] change in time
Given,
Mass of rocket, [tex]m = 5*10^5Kg[/tex]
Thrust,[tex]T = 1.5*10^7N[/tex]
Air resistance [tex]F_a= 4.5*10^6N[/tex]
The net upward force will be
[tex]F_n= T-F_a\\F_n= 1.5*10^7-4.5*10^6\\F_n= 1.05*10^7N[/tex]
Using
[tex]F = ma\\a = \frac{F}{m}\\a = \frac{1.05*10^7}{5*10^5}\\a = 21 m/s^2[/tex]
Thus the acceleration is [tex]21m/s^2[/tex].
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To calculate the rocket's acceleration, subtract air resistance from the engine's thrust to get the net force and then divide it by the rocket's mass according to Newton's second law. The acceleration is found to be 21 [tex]m/s^2[/tex].
To determine the rocket's acceleration, we must apply Newton's second law of motion, which states that force equals mass times acceleration (F = ma). In this scenario, we have two forces to consider: the rocket engine's thrust and the air resistance acting against it. The net force is calculated by subtracting the air resistance from the engine's thrust.
Firstly, we must find the net force acting on the rocket. To do this, we subtract the air resistance from the thrust:
Net Force = Thrust - Air Resistance
[tex]Net Force = 1.50 X 10^7 N - 4.50 X 10^6 N\\Net Force = 10.5 X 10^6 N[/tex]
Now, using Newton's second law, we set up the equation for acceleration (a = F/m), where F is the net force and m is the mass of the rocket:
Acceleration (a) = Net Force (F) / Mass (m)
[tex]Acceleration (a) = \frac{10.5 X 10^6 N}{5.00 X 10^5 kg}\\Acceleration (a) = 21 \ m/s^2[/tex]
Thus, the acceleration of the rocket is 21 meters per second squared.
what property of matter is momentum related to
Momentum is a property of matter related to mass and velocity. It has a directional component, aligning with the velocity of the object. Additionally, it has importance in physics principles and displays wave properties on a subatomic level.
Explanation:Momentum is a property of matter that is intrinsically connected to both the object's mass and velocity. From the formula of momentum, p=mv, we can see that momentum is directly proportional to mass and also velocity. Thus, the greater an object's mass or the faster it moves, the greater its momentum.
Momentum is a vector quantity, meaning it also has a direction aligning with the velocity of the object. Many concepts in physics such as Newton's second law of motion, can be restated in terms of momentum. Furthermore, momentum conservation is a fundamental principal used to analyze matters from simple collisions to complex particle physics.
Also, on a microscopic scale, momentum is observed to have wave properties that are integral to understanding the behaviours of subatomic particles.
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A ball is launched with initial speed v from the ground level up a frictionless hill. the hill becomes steeper as the ball slides up; however, the ball remains in contact with the hill at all times. using conservation of energy, find the maximum vertical height hmax to which the ball will climb. express your answer in terms of v and g.
The ball will rise to a maximum height of [tex]\boxed{h=\dfrac{v^2}{2g}}[/tex].
Explanation:
The kinetic energy of a body is the energy associated with the body by virtue of its motion whereas the potential energy of the body is the amount of energy stored in a body by virtue of its position.
The amount of kinetic energy stored in a body is given by:
[tex]\boxed{K=\dfrac{1}{2}mv^2}[/tex] ...... (1)
Here, [tex]K[/tex] is the kinetic energy, [tex]m[/tex] is the mass and [tex]v[/tex] is the speed of the body.
The potential energy stored in a body as it reaches its maximum height is given as:
[tex]\boxed{P=mgh}[/tex] ...... (2)
Here, [tex]P[/tex] is the potential energy stored, [tex]g[/tex] is the acceleration due to gravity and [tex]h[/tex] is the height attained by the body.
According to the conservation of energy, the energy can neither be created nor destroyed. It can only be converted from one form to another.
[tex]\text{kinetic energy}=\text{potential energy}[/tex]
Substitute the values of kinetic energy and potential energy and simplify the expression for the maximum height.
[tex]\begin{aligned}\dfrac{1}{2}mv^{2}=&mgh_{max}\\h_{max}=&\dfrac{v^2}{2g}\end{aligned}[/tex]
Therefore, the maximum height attained by the ball as it rises up is [tex]\boxed{h_{max}=\dfrac{v^2}{2g}}[/tex].
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Answer Details:
Grade: Senior School
Subject: Physics
Chapter: Conservation of Energy
Keywords:
Ball is launched, ground level, conservation of energy, kinetic, potential energy, motion, maximum height, in contact with hill, vertical height, in terms of v and g.
Using the conservation of energy, the maximum vertical height hmax a ball can reach when launched up a frictionless hill is given by the equation hmax = v²/2g. The ball's initial kinetic energy is converted into potential energy at the maximum height, at which point its speed is momentarily zero.
Explanation:To determine the maximum vertical height hmax that the ball will reach, we can invoke the law of conservation of energy. This fundamental principle asserts that the total energy of an isolated system remains constant, expressing that energy can be converted from one form to another, but not created or destroyed.
At the initial moment before the launch, the ball has kinetic energy but no potential energy (since it's at ground level). The kinetic energy is given by the formula 1/2mv², where m is mass, and v is initial speed.
At the moment when the ball has climbed to maximum height (hmax), it comes momentarily at rest, so its kinetic energy is zero and all converted to the potential energy. The potential energy at this position is given by m*g*hmax, where g is the acceleration of gravity.
Forming an equation using the law of conservation of energy, we equate the initial kinetic energy and the final potential energy as: 1/2mv² = m*g*hmax. Solving for hmax we have: hmax = v²/2g.
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Can congress expand the scope of the supreme court’s original jurisdiction beyond what is specified in article iii of the constitution by simply passing a law?
The answer is No. The explanation behind this is found in Article III, it is stated there that the “Supreme Court shall have original jurisdiction in all circumstances touching ambassadors, other public ministers and diplomats, and those in which a state shall be a party. In all other circumstances the Supreme Court shall have appellate jurisdiction”. Therefore if the legislature augments to their jurisdictions, then there would be numerous courts with definite jurisdiction.
The more energy a wave carries the BLANK its amplitude.
Answer:
The more energy a wave carries the higher its amplitude.
Explanation:
The energy of a wave is defined by the equation:
[tex]E=\frac{1}{2} m\omega^2 A^2[/tex]
Where [tex]E[/tex] is energy, [tex]m[/tex] is mass, [tex]\omega[/tex] is angular velocity, and [tex]A[/tex] is amplitude.
The previous equation indicates that the energy is directly proportional to the amplitude; if the energy of a wave increases so does the amplitude, and if the energy of a wave decreases the amplitude also decreases.
Thus the answer is:
The more energy a wave carries the higher its amplitude.
What eyeglasses would you prescribe for persons with the following conditions:
A near point of 56.6cm?
A far point of 56.6cm?
Final answer:
A person with a near point of 56.6cm is farsighted and needs convex lenses to correct their vision.
A person with a far point of 56.6cm is nearsighted and requires diverging lenses.
Explanation:
To correct for vision where a person has a near point of 56.6cm, they are likely farsighted. Farsightedness is corrected using convex lenses that converge the light before it hits the eye. This increases the eye's focusing power to bring nearby objects into clear vision.
For a person with a far point of 56.6cm, they are suffering from myopia, or nearsightedness. They require diverging lenses, typically negative diopter lenses, to spread out the light before it reaches the eye. This extends the far point of their vision, allowing them to see distant objects more clearly.
If the eyeglasses are held 1.50 cm from the eyes, we would need to consider the vertex distance in the lens formula to calculate the required lens power. The formula to determine the lens power needed, in diopters (D), is 1/f, where f is the focal length in meters. Since the eyeglasses are not in direct contact with the eye, the formula to find the effective focal length f' when considering vertex distance d is f' = f - d.
Which characteristics of Earth’s orbit are in agreement with Kepler’s second law? Check all that apply.
-Earth experiences the strongest gravitational force when it is farthest from the Sun.
-Earth experiences the strongest gravitational force when it is closest to the Sun. -Earth moves the greatest distance in thirty days when it is farthest from the Sun. -Earth moves the greatest distance in thirty days when it is closest to the Sun. -----Earth travels with the slowest tangential speed when it is farthest from the Sun. --Earth travels with the slowest tangential speed when it is closest to the Sun. ----------Earth sweeps out the same area in the same time frame anywhere in its orbit
Explanation :
The angular velocity of the planet in the elliptical orbit will vary. Its shows that the planet travel slower when farther from the sun, then faster when closer to the sun.
1. Yes, Earth experiences the strongest gravitational force when it is closest to the Sun.
2. Yes, Earth moves the greatest distance in thirty days when it is closest to the Sun.
3. Yes, Earth travels with the slowest tangential speed when it is farthest from the Sun.
4. Yes, Earth sweeps out the same area in the same time frame anywhere in its orbit
Kepler's second law : Kepler describe the motion of the planets around the sun. the line joining the planet and the sun sweeps out the same area in the same time.
The characteristics of Earth’s orbit that that agree and follow the pattern of Kepler’s second law are;
Earth experiences the strongest gravitational force when it is closest to the Sun.
Earth moves the greatest distance in thirty days when it is closest to the Sun.
Earth travels with the slowest tangential speed when it is farthest from the Sun.
Earth sweeps out the same area in the same time frame anywhere in its orbit
Kepler's second law of planetary motion can be regarded as one that describe the speed of a planet which moves in an elliptical orbit around the Sun. It states that there is equal areas as well as equal times between the sun and the planet sweeps, which implies that planet experience increase in speed as it get nearer the Sun.This helps in explaining how Earth travels with the slowest tangential speed onces its moving away from the Sun.Therefore, Earth usually have strongest gravitational force as it moves close to the sun.
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A small car with mass 0.800 kg travels at constant speed on the inside of a track that is a vertical circle with radius 5.00 m. if the normal force exerted by the track on the car when it is at the top of the track (point
b.is 6.00 n, what is the normal force on the car when it is at the bottom of the track (point a)?
The normal force on a car traveling inside a vertical circular track differs at the top and bottom. At the top, the normal force is in the same direction as gravity, and at the bottom, it supports the car's weight against gravity plus provides the centripetal force. To find the normal force at the bottom, one must use the equations for circular motion taking into account the gravitational force.
Explanation:To determine the normal force on the car at the bottom of the track (point A), we must consider that the car is in circular motion, and at the top and bottom of the track, the forces acting on the car are different due to its position relative to the center of the circular path.
At the top of the track, the normal force and the weight of the car both act downwards. Since the car is in circular motion and is not accelerating vertically, the net force must be equal to the centripetal force required to keep the car moving in a circle. This can be represented by the equation N + mg = mv2/r at point B, where N is the normal force, m is the mass of the car, g is the acceleration due to gravity, v is the speed of the car and r is the radius of the circular path.
At the bottom of the track, the normal force acts upwards while the weight of the car acts downwards. The normal force at the bottom must be greater than at the top because it must support the car's weight in addition to providing the centripetal force. So, the equation at point A is N - mg = mv2/r.
From the information provided, we know that the normal force at the top is 6.00 N, the mass of the car is 0.800 kg, and the gravitational acceleration is 9.8 m/s2. By writing out both equations for the normal force at the top and bottom, and substituting the known values, we can solve for the unknown normal force at the bottom of the track.
What can accurately be said about a resultant wave that displays both reinforcement and interference? A. The component waves have different frequencies. B. Maximum interference occurs where the troughs of the two component waves are in phase. C. Molecules remain in their normal positions at spots of reinforcement. D. The crests of the two component waves are in phase where interference occurs in the resultant wave. Mark for review (Will be highlighted on the review page)
A. The component waves have different frequencies.
Explanation;interference is one of the property of waves that occurs when two waves superpose to form a resultant wave of greater, lower, or the same amplitude.Interference occurs when two waves travelling in the same medium at the same time. It may be either a constructive or a destructive interference.Constructive interference occurs when the two waves are in phase and have the same frequency, the amplitudes are therefore, reinforced resulting to a constructive interference. However, if the two waves are out phase the result will be a destructive interference.What fundamental belief explains the european exploitation of non-western cultures such as those in the americas and africa?
Why can’t conductors generate static electricity when rubbed together?
Answer:
Like electric charges repel each other. ... Why can't conductors generate static electricity when rubbed together? They will direct excess charge to earth. Suppose you acquire a positive charge from walking across a carpet.
Explanation:
[tex]hope \: it \: helps \: you[/tex]
Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating _____.
nuclear fusion
a planet
nuclear differentiation
dust and gas
why is it incorrect to say "We ran out of gas." when referring to your cars energy source?
Answer:
Because when the gas runs out, there is still energy in the car, but another form of energy.
Explanation:
Car, motorcycle, bus, and truck engines produce motion from a chemical reaction known as combustion. We can say that the chemical energy of gas in a car is converted to thermal energy during the explosion of gasoline or diesel. This released thermal energy causes the engine to tighten the engine piston, producing movement and hence kinetic energy.
However, the car has other forms of energy as it needs an entire electrical system to function. For this reason, it is wrong to say that "We ran out of gas." when it comes to your car's energy source.
A box has a length of 12 cm, a height of 22 cm, and a width of 18 cm. How tall would a stack of 12 of these boxes be?
a. 144 cm
b. 216 cm
c. 264 cm
d. 484 cm
A soccer ball is traveling at a velocity of 50 m/s. The kinetic energy of the ball is 500 J. What is the mass of the soccer ball? (Formula: KE = 1/2mv^2 )
0.1 kg
0.2 kg
0.4 kg
0.5 kg
The mass of a soccer ball traveling at a velocity of 50 m/s and has a kinetic energy of 500 J is 0.4kg.
How to calculate mass?The mass of a soccer ball can be calculated using the following formula:
K.E = ½mv²
Where;
K.E = kinetic energy (J)m = mass (kg)v = velocity (m/s)According to this question, a soccer ball is traveling at a velocity of 50 m/s and has a kinetic energy of 500 J. The mass of the kinetic energy is as follows:
500 = ½ × m × 50²
500 = ½ × 2500m
500 = 1250m
m = 500/1250
m = 0.4kg
Therefore, the mass of a soccer ball traveling at a velocity of 50 m/s and has a kinetic energy of 500 J is 0.4kg.
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1. A wave has a wavelength of 14 mm and a frequency of 17 Hertz. What is its speed?
2. What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 11 Hz?
Which forces include attractive and repulsive interactions? A. electric and magnetic forces B. static friction and air resistance C.rolling friction and fluid friction D. gravitational and spring forces
Answer: A. electric and magnetic forces
Explanation:
Magnetic force acts between two magnetic objects. A magnet has two poles- North pole and South pole. Like poles repel each other and unlike poles attract each other. Electric force acts between two charged objects. Two similarly charged bodies have repulsive force between them and attractive force exists between two dissimilar charged objects.Thus, an electric force and magnetic force are repulsive and attractive in nature.
A person stands on a bathroom scale in a motionless elevator. when the elevator begins to move, the scale briefly reads only 0.66 of the person's regular weight. calculate the acceleration of the elevator, and find the direction of acceleration. m/s2
To calculate the acceleration of the elevator, we can use Newton's second law, Fnet = ma, where Fnet is the net force acting on the person and m is the mass of the person. The acceleration of the elevator is equal to 0.34 times the person's weight divided by the person's mass.
Explanation:When the elevator starts to move, the scale briefly reads only 0.66 of the person's regular weight. To calculate the acceleration of the elevator, we can use Newton's second law, Fnet = ma, where Fnet is the net force acting on the person and m is the mass of the person. In this case, the net force is equal to the difference between the weight of the person and the scale reading, so we have Fnet = w - Fs. The scale reading is given as 0.66 of the person's weight, so Fs = 0.66w. Plugging this into the equation, we get Fnet = w - 0.66w = 0.34w. Since Fnet = ma, we can write 0.34w = ma. Dividing both sides by the mass, we get a = 0.34w/m. Therefore, the acceleration of the elevator is equal to 0.34 times the person's weight divided by the person's mass.
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José has just played a long, bruising football game but feels little fatigue or discomfort. His lack of pain is most likely caused by the release of
José's lack of pain is likely due to the release of endorphins, which are natural pain relievers produced by the body during intense physical activity.
José's lack of pain after a long and bruising football game is most likely due to the release of endorphins. Endorphins are neurotransmitters produced by the central nervous system and the pituitary gland. Known as the body's natural pain relievers, they are released in response to stress or discomfort to inhibit the transmission of pain signals in the brain and produce a feeling of euphoria.
This phenomenon is often referred to as a 'runner's high' and can occur during and after intense physical activity.
Your friend says that inertia is a force that keeps things in their places, either at rest or motion. do you agree? why or why not? 1. disagree; inertia is a property of matter to behave this way, not some kind of force. 2. agree; only forces can keep things in their places. 3. disagree; inertia is a force that keeps things moving. 4. all are wrong. 5. agree; inertia is not a force that keeps things moving.
Answer:
1. Disagree; inertia is a property of matter to behave this way, not some kind of force.
Explanation:
Newton's first law of motion states that a body will remain in rest or in uniform motion while no external force is applied on it. What makes things to preserve their states of motion in inertia. It can be easy to understand remembering that the mass of the objects is the measure of their inertia. Since the mass is a property of matter so is the inertia.
Two water jets are emerging from a vessel at a height of 50 centimeters and 100 centimeters. If their horizontal velocities at the point of ejection are 1 meter/second and 0.5 meters/second respectively, calculate the ratio of their horizontal distances of impact.
Answer:
1.41:1
Explanation:
Is it true or false that radiation transfers energy by moving matter
Radiation transfers energy through electromagnetic waves, not by moving matter.
Explanation:The statement that 'radiation transfers energy by moving matter' is false.
Radiation transfers energy through electromagnetic waves, which do not require the movement of matter. Atoms and molecules emit electromagnetic radiation as their electrons move about and collide or vibrate in place. This radiation carries energy and can be absorbed by other material.
For example, in a hot material, the individual particles vibrate or move rapidly from collisions, resulting in more energetic waves being emitted. On the other hand, cool material generates lower-energy waves due to low-energy atomic and molecular motions.
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HELP ME PLS
Which label belongs in the area marked Z?
take in from atmosphere
produce themselves
eat other organisms
absorb from soil
it won't let me insert it, but the category is producers so what do producers do
The label which belongs in the area marked Z having characteristics as
take in from atmosphereproduce themselveseat other organismsabsorb from soilare producers.
What are producers?Autotrophs, also called as primary producers are organisms that acquire their energy from sunlight and materials from nonliving sources. Algae, and some bacteria are important autotrophs in running waters.
Heterotrophs obtain energy and materials by taking living or dead plants or animals matter.
Producers create their own food using sunlight and absorb water from the soil.
Thus, the category labelled as producers.
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What’s the best way to remember kinematics for my physics exam
Final answer:
The best way to remember kinematics for your physics exam is to follow a step-by-step approach, including examining the situation, identifying knowns and unknowns, and using appropriate kinematic equations.
Explanation:
Steps to Remember Kinematics for a Physics Exam:
Examine the situation to determine the physical principles involved.
Identify the knowns and unknowns in the problem.
Find an appropriate kinematic equation(s) to solve the problem.
For example, if time is not given, you can use the kinematic equation that does not involve time.
Remember to draw a simple sketch of the situation and assign positive/negative directions.
Practice applying these steps to different kinematic problems to improve your understanding and retention.
To measure the height of a building without a ruler or tape measure, an engineer drops a rock off the top of the building and finds out it takes 4.9 seconds for the rock to reach the ground. How high is the building
Could you please tell me the steps, as well? I kind of understand how to do it, but some help would be greatly appreciated (:
Thanks.
The relevant equation we can use in this problem is:
h = v0 t + 0.5 g t^2
where h is height, v0 is initial velocity, t is time, g is gravity
Since it was stated that the rock was drop, so it was free fall and v0 = 0, therefore:
h = 0 + 0.5 * 9.81 m/s^2 * (4.9 s)^2
h = 117.77 m
Final answer:
To find the height of the building, the formula for the distance an object falls due to gravity is used: d = 1/2 g t². Inserting the given time of 4.9 seconds and the gravitational constant of 9.8 m/s² the calculated height of the building is approximately 117.549 meters.
Explanation:
To measure the height of a building by dropping a rock and timing its fall, we use the physics of free fall motion. The equation to find the distance an object falls due to gravity (when air resistance is negligible) is:
d = ½ g t²
where:
d is the distance the object falls (height of the building in this case),
g is the acceleration due to gravity (approximately 9.8 m/s² on Earth), and
t is the time it takes for the object to reach the ground.
Given the time of 4.9 seconds for the rock to reach the ground, we plug in the values:
d = ½ (9.8 m/s²) (4.9 s)²
This gives us:
d = ½ (9.8) (24.01)
d = 117.549 m
By using this formula, we can find that the building is approximately 117.549 meters high.
Janessa got through high school easily because she could remember what her teachers said in class and their tests never covered anything else. but in college she is struggling with how to study more complex material, how to prepare for exams that demand that she apply what she is learning, and how to reconcile the apparent conflicts between what she learns in one course and what she learns in another. janessa's concerns fall into which domain?
The maximum efficiency of a heat engine operating between 2 degrees c and 200 degrees c will be about:
The maximum efficiency of heat is 72%.
To find the efficiency, the given values are:
Temperature T1 = 2 degree celsius,
Temperature T2 = 200 degree celsius.
What is Efficiency?The peak level of performance that uses the least amount of inputs to achieve the highest amount of output can be defined as the efficiency.
Usually the word efficient means as quality or being efficient.
Efficiency value will be calculated in percentage.
The formula of efficiency can be,
Efficiency =( T1 - T2/ T1) × 100
T1 - First temperature
T2 - Second temperature
Converting the values from degree celsius to Kelvin,
T1= 2+273 =275 K
T2 = 200 +273=473 K
Substituting the values in the formula,
Efficiency = (275 - 473 / 275)×100
= ( 198 ×100)/275
= 72 %
The maximum efficiency of a heat is 72%.
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