MECHANICAL EQUIVALENT OF HEAT EXPERIMENT The English physicist James Prescott Jo
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MECHANICAL EQUIVALENT OF HEAT EXPERIMENT The English physicist James Prescott Joule measured the relationship between heat en- OBJECTIVE energy in a series of ex After completing this experiment, you should be able to make an approximate mea periments that extended over a period of al- most thirty years. is too complex to be used in this experim rement of the mechanical equivalent of heat APPARATUS alent of heat can be obtained by using rather heavy cardboard tube about 1.0 m long and materiajs You will drop a specific mass 4.0cm in diameter of buckshot inside a cardborrrrute an m sure the resultant increase in temperature. When the buckshot falls the length of the tube and hits the cork stopper at the other end, vir- tually all the kinetic energy of the buckshot will be converted into heat energy. Because of the insulating properties cardboard walis of the tube, this heat e thermometer 1 kg of buckshot (lead) styrofoam cup and lid meterstick large metal pan platform balance and set of masses ice cubes of the cork and the PROCEDURE will be confined mostly to the buckshot and consequently raise its temperature. Measure the mass of the buckshot, place i nt Chet /91acExplanation / Answer
No mass is necessary to be measured as we are measuring specific heat because it is experimentally useful not Heat capacity.
A cooler object heats faster than a relatively hotter object, so as to have significant increase in temperature, it is cooled.
In addition to errors of measuring apparatus like weighing scale,thermometer,scale etc heat lost to air will not be considered.
Things are considered ideal always like, cardboard,air as ideal insulators etc.
This experiment instead of being done in room, should be in a chamber such that no heat is transferred to buckshot from the room.
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