PURPOSE: To demonstrate quantitatively the conversion of electrical energy into heat.
DESCRIPTION: About 300 ml of water is heated in a beaker with a 200-watt immersion heater. Measure the initial water temperature, let the water heat for a fixed time with the immersion heater, and measure the final water temperature. Good to a bout ten percent.
SUGGESTIONS:
EQUIPMENT: 600 ml glass beaker with 300 ml water, 200 watt immersion heater, and digital thermometer.
SETUP TIME: 5 min.
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