Aluminum has a specific heat of 0.902 J/g x oCTwo pieces of aluminum, with masses of 10 kg, cool from 400 oC to 100oCOne mass is round; the other is a cubeAll BUT one statement is true regarding the energy transformationThat is A) both masses lose the same amount of heat energy B) the masses cool in approximately the same amount of time C) the heat energy lost is directly related to the shape of the object D) the kinetic energies of the masses decrease during the cooling processPlease help me out):
The rate of cooling is proportional to the surface area of the shapeSince they both have the same amount of heat to loose, the one with the greatest surface area will cool most rapidlyFor a given mass, a sphere has the least surface area of any known shape, so the cube will cool most rapidlyLooking through the choices, A) True B) False C) True D) True, but only if the KE is referring to the molecular KE; the masses per se are stationary.
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