iron

lead

concrete

wood

system has high C.O.P.

power per TR is low

mass of refrigerant circulated in the system is low

mass of the refrigeration equipment is low

Zeroth law of thermodynamics

First law of thermodynamics

Second law of thermodynamics

Kirchhoff's law

single fluid

two fluids

three fluids

four fluids

requires

does not require

no answer

none of these