Define; i) Heat engine

ii) Heat pump

b) Compare and contrast a heat engine and heat pump.

c) The energy absorbed by an engine is three times as great as the work it performs.

i) What is its thermal efficiency?

ii) What fraction of the energy absorbed is expelled to the cold reservoir?

iii) What is the power output of the engine if the energy input is 1 650 J each cycle

and it goes through two cycles every 3 seconds?

d) A heat pump with a COP of 2.50 is used to cool a room. Calculate:

i) How much work must a do in order to extract 1.00 MJ of thermal energy from the

outdoors (the cold reservoir)?

ii) If the unit operates at 0.500 hp, how long will the process take?​

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

What does si stand for,when referring to a system of measurement

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0