# lab2 - J/calorie 1 1 Accepted Value = J/cal 2 Percent...

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Physics 320 Experiment 2 Conservation of Energy: The Electrical Equivalent of Heat DATA SHEET Name: __________________ Date: ___________ 1. The measured resistance of the heater is 10.4 2. The voltage applied across the heating resistor is 5.9V 3. The power dissipated by the heating resistor is 3.35W 4. The mass of water in cup is 150grams 5. Paste a copy of your temperature–time graph here. Phys320 Lab Page 1 Experiment 2

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Physics 320 Experiment 2 continued 6. Data Table Item Amount Item Amount initial time t i s initial temperature Ti ˚C final time t f s final temperature Tf ˚C change in time s Change in Temp. ˚C Item Amount Electrical Energy, J Thermal Energy, calories Electrical Equivalent of Heat
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Unformatted text preview: J/calorie 1. 1. Accepted Value = J/cal 2. Percent difference = ___ ___ ___ % Phys320 Lab Page 2 Experiment 2 Physics 320 Experiment 2 continued Questions 7. Was the thermal energy gained by the water greater, the same as, or less than the electrical energy dissipated by the resistor? 8. The heating resistor is rated at 10 ohms and 1 watt. What percentage of the power rating was used during this activity? Why didn’t the resistor burn up? 9. What are some factors that could account for the percent difference between the experimental and the accepted values for the electrical equivalent of heat? Phys320 Lab Page 3 Experiment 2...
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## This note was uploaded on 04/21/2011 for the course PHYS 270 taught by Professor Danielhale during the Spring '11 term at DeVry Chicago.

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lab2 - J/calorie 1 1 Accepted Value = J/cal 2 Percent...

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