The kinetic theory of heat states that energy is transferred as fast moving particles in an object at a high temperature collide with slow moving particles in an object at a lower temperature. the fast moving particles give some of their energy to the slower moving particles. this is why heat flows from to

a. hot to cold

b. cold to hot

c. point a to point b

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.