Unformatted text preview: temperature. Ideally no energy will be lost outside the drum and the above two equations can be set equal to one another. To carry out the experiment wrap the string around the drum a couple times and begin to crank the weight up. If the weight can stay at the same level while cranking then the amount of times the string is wrapped around the drum is sufficient. Resistance is measured by a thermistor that needs to be plugged into a computer determines temperature. Determine the initial temperature before cranking, and then crank the apparatus in turns of 50 up to 400 times briefly pausing after each 50 to record time and resistance. Let the crank cool for an equal amount to time and then get another resistance reading to determine heat loss. Do work and heat calculations for each set of 50 turns. Next determine heat loss and plot mechanical work v. heat. Determine slope from this graph and check if it matches assumptions....
View
Full Document
 Fall '08
 CARONE
 Physics, Energy, Heat, Joule, Mechanical Work, Heat Prelab

Click to edit the document details