A thermally isolated system is made up of a hot piece of aluminum and a cold pie

Question

A thermally isolated system is made up of a hot piece of aluminum and a cold piece of copper, the aluminum and the copper are in thermal contact. The specific heat capacity of aluminum is more than double that of copper. Which object experiences the greater temperature change during the time the system takes to reach thermal equilibrium? (a) the aluminum (b) the copper (c) neither; both experience the same size temperature change (d) it is impossible to tell without knowing the masses (e) it is impossible to tell without knowing the volumes A proton has a total energy E three times its kinetic energy. What is the speed of the proton? (a) c (b) 0.57c (c) 1.5c (d) 0.87c (e) 0.75c

Explanation / Answer

25. A proton has a total energy E three times its kinetic energy. what is the speed of the proton ?

Ans: (d) 0.87c

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