An ideal refrigerator operates between a cold space at a temperature of −13 ∘C-13\text{ }^\circ\text{C}−13 ∘C and a hot space at a temperature of 37 ∘C37\text{ }^\circ\text{C}37 ∘C.
Calculate the input power to the refrigerator if the rate of transfer of energy to the hot space is 155 W155\text{ W}155 W.
29 exam-style questions on AQA A Level Physics Thermodynamics and engines (A-level only), covering First law of thermodynamics (A-level only), Non-flow processes (A-level only), The $p$ - $V$ diagram (A-level only), Engine cycles (A-level only), Second Law and engines (A-level only), and Reversed heat engines (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.