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11_Heat_Equiv

# 11_Heat_Equiv - INDIANA UNIVERSITY DEPARTMENT OF PHYSICS...

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INDIANA UNIVERSITY, DEPARTMENT OF PHYSICS, P309 LABORATORY Laboratory #11: Mechanical Equivalent of Heat Goal: Investigate the equivalence of mechanical and heat energy. Equipment: Mech. equivalent of heat apparatus (Leybold 388) with thermometer and 5kg mass, caliper, lab balance, set of weights. (A) Introduction In this experiment a measured amount of mechanical energy is transferred to a calorimeter. From the temperature rise of the calorimeter the heat energy is deduced and the two energies are compared. The experiment (the only one in the lab that does not require electricity) is very simple, but offers interesting insights into the analysis of uncertainties. (B) What to do The mechanical work is applied by the friction of a string wound around the drum of the calorimeter (diameter d). The string is attached to a mass M; the number of windings should be such that M lifts off the floor when the crank is turned. This can be controlled by guiding the loose end of the string with your hand (without applying a force). Determine d

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11_Heat_Equiv - INDIANA UNIVERSITY DEPARTMENT OF PHYSICS...

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