Answer:
a. 
b. 
c. 
Explanation:
Given:
- temperature of the hotter reservoir,

- temperature of the colder reservoir,

- heat absorbed by the engine,

- heat rejected to the cold reservoir,

- time duration of the energy transfer,

<u>Now the work done by the engine:</u>
Using energy conservation,



a.
<u>Hence the power output:</u>



b.



c.
now actual efficiency:



Less of a glass of water because a glass of water holds approximately 250 mil-liters of water
Gravitational potential energy is defined as the amount of energy an object possesses at a given height above the Earth's surface. The equation for gravitational energy is E = mgh. Here, m is the mass of the object, g is the acceleration due to gravity, and h is the height above the Earth's surface. Hence, the answer is E = 2000kg x 9.81m/s^2 x 2m = 39240 Joules.
A)a gun moves backward while firing a bullet.
Explanation:
A gun moving backward while firing a bullet is a good example of newton's third law in action.
Newton's third law of motion states that "Action and reaction forces are equal and opposite in direction".
In shooting a gun, the bullet pulls forward by the action of the recoil down the barrel. This is the action force. The backward pull of the gun is the reactive force.
learn more:
Newton's laws brainly.com/question/11411375
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