1.The resistance of a thermistor over a limited range of temperature is given by where c is a constant and T is the absolute temperature. What will be the temperature on the Celsius scale of the thermistor at absolute temperature of T = 300K? 2. A woman finds a front windshield of a car covered with ice at -12oC. The ice mm and the windshield area is 125mm2. The density of the ice is 917kg/m3. How much heat is required to melt the ice? [S.H.C of ice = 2200J/kg/K, Lf =3.3x105J/kg]. 3. An electric heater of power 2kW is used to heat 0.8kg of water in a container of heat capacity 300J/K. If the water is initially at 18oC, how long will it take to heat it to the boiling point of 100oC? What mass of water will have boiled away in 4 minutes? [S.H.C of water = 4200J/kg/K, LV = 2.3X106J/kg] 4. Explain anomalous expansion of water. 5. Steel railway tracks are laid at 8oC. What size of expansion gap are needed 10m long rail sections if the ambient temperature varies from -10oC to 50oC?
1.The resistance of a thermistor over a limited range of temperature is given by where c is a constant and T is the absolute temperature. What will be the temperature on the Celsius scale of the thermistor at absolute temperature of T = 300K? 2. A woman finds a front windshield of a car covered with ice at -12oC. The ice mm and the windshield area is 125mm2. The density of the ice is 917kg/m3. How much heat is required to melt the ice? [S.H.C of ice = 2200J/kg/K, Lf =3.3x105J/kg]. 3. An electric heater of power 2kW is used to heat 0.8kg of water in a container of heat capacity 300J/K. If the water is initially at 18oC, how long will it take to heat it to the boiling point of 100oC? What mass of water will have boiled away in 4 minutes? [S.H.C of water = 4200J/kg/K, LV = 2.3X106J/kg] 4. Explain anomalous expansion of water. 5. Steel railway tracks are laid at 8oC. What size of expansion gap are needed 10m long rail sections if the ambient temperature varies from -10oC to 50oC?
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN:9781337553292
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter1: Physics And Measurement
Section: Chapter Questions
Problem 28P
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Question
1.The resistance of a thermistor over a limited range of temperature is given by where c is a constant and T is the absolute temperature.
What will be the temperature on the Celsius scale of the thermistor at absolute temperature of T = 300K?
2. A woman finds a front windshield of a car covered with ice at -12oC. The ice mm and the windshield area is 125mm2. The density of the ice is 917kg/m3. How much heat is required to melt the ice?
[S.H.C of ice = 2200J/kg/K, Lf =3.3x105J/kg].
3. An electric heater of power 2kW is used to
heat 0.8kg of water in a container of heat capacity 300J/K. If the water is initially at 18oC, how long will it take to heat it to the boiling point of 100oC? What mass of water will have boiled away in 4 minutes?
[S.H.C of water = 4200J/kg/K, LV = 2.3X106J/kg]
4. Explain anomalous expansion of water.
5. Steel railway tracks are laid at 8oC. What size of expansion gap are needed 10m long rail sections if the ambient temperature varies from -10oC to 50oC?
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