Two-stage refrigeration cycle: a two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit uses refrigerant-134a as the working fluid. the system operates the evaporator at -40oc, the condenser at 800 kpa, and the separator at - 10.1oc. the system is to serve a 30-kw cooling load ( ql ). determine a) the mass flow rate through each of the two compressors, b) the power used by the compressors, and c) the system’s cop. the refrigerant is saturated liquid at the inlet of each expansion valve and saturated vapor at the inlet of each compressor, and the compressors are isentropic.

answer; (arch); good luck

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.