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Consider two apple pies that are identical in every respect, exceptthat pie 1 is

ID: 1676543 • Letter: C

Question

Consider two apple pies that are identical in every respect, exceptthat pie 1 is piping hot and pie 2 is at room temperature.
PART A: If identical forces areapplied to the two pies, is the acceleration of pie 1 greater than,less than, or equal to the acceleration of pie 2?
PART B: Choosethe best explanation from amongthe following: 1.The acceleration of pie 1 is greaterbecause the fact that it is hot means it has the greaterenergy. 2.The pies havethe same acceleration regardless of their temperature because theyhave identical rest masses 3.The fact that pie 1 is hot means itbehaves as if it has more mass than pie 2, and therefore it has asmaller acceleration.
PART A: If identical forces areapplied to the two pies, is the acceleration of pie 1 greater than,less than, or equal to the acceleration of pie 2?
PART B: Choosethe best explanation from amongthe following: 1.The acceleration of pie 1 is greaterbecause the fact that it is hot means it has the greaterenergy. 2.The pies havethe same acceleration regardless of their temperature because theyhave identical rest masses 3.The fact that pie 1 is hot means itbehaves as if it has more mass than pie 2, and therefore it has asmaller acceleration.

Explanation / Answer

Relativistically speaking pie 1 has more mass because itradiates energy E in cooling. Since E = m c2 it loses mass in cooling.