A stone has initial potential, kinetic and internal energy 4 J, 15 J and 20 J respectively, if the final kinetic energy and potential energy of the stone is 5 J and 10 J respectively, what is the final internal energy?
(a) 15 J
(b) 20 J
(c) 24 J
(d) 32 J
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Question is from Internal Energy and Energy Conversion Concept topic in portion Introduction to Energy Balances for Processes without Reaction and Calculation of Enthalpy Changes of Basic Chemical Engineering