phys320 lab1_cooling_data_sheetbillzach

phys320 lab1_cooling_data_sheetbillzach - Physics 320...

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Physics 320 Experiment 1 Newton’s Law of Cooling DATA SHEET Name: Bill Zacharias Date: April 29, 2010 Prediction 1. How long does it take for a thermometer to reach the same temperature as that of its surroundings? I predict that it will take the thermometer 4.2 minutes to reach the temperature of it's surroundings. Data 2. Paste a copy of your temperature–time graph for the cooling thermometer here. 3. What are the parameters of your natural exponent fit? a = 48 b = 22 Phys320 Lab Page 1 Experiment 1
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Unformatted text preview: Physics 320 Experiment 1 continued c = .0122 4. From the exponential fit, what is the time constant of the thermometer? t = 1/.0122=82s Questions 1. How long should I wait to be sure that the thermometer temperature is the same as the room temperature? I would wait for atleast a 5 time constant which would be 410 seconds in this instant. 2. Would I have to wait as long if I placed the hot thermometer in room temperature water? No. Phys320 Lab Page 2 Experiment 1...
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