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The following physics responses are provided by a student and, as such, should be considered in that context. While every effort is made for accuracy, absolute correctness cannot be fully guaranteed.
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Question
Answer
11
The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through the wall by what process?conduction
11
Twenty grams of a solid at 70°C is placed in 100 grams of a fluid at 20°C. Thermal equilibrium is reached at 30°C. The specific heat of the solid:Is more than that of the fluid.
11
What is the temperature increase of 4.0 kg of water when heated by an 800-W immersion heater for 10 min? (cw = 4 186 J/kg×°C)29°C
11
What temperature increase is necessary to increase the power radiated from an object by a factor of 8?about 68%
11
When a wool blanket is used to keep warm, what is the primary insulating material?air
11
Which of the following best describes a substance in which the temperature remains constant while at the same time it is experiencing an inward heat flow?substance undergoing a change of state
11
Which of the following involves the greatest heat transfer?One gram of steam at 100°C changing to water at 100°C.
11
Which of the following produces greenhouse gases? 1) burning fossil fuel 2) digestive processes in cows 3) automobile pollution 4) manufacturing processes 5) all of the above5) all of the above
11
Which of the following statements is true? 1) A hot object contains a lot of heat. 2) A cold object contains only a little heat. 3) Objects do not contain heat. 4) Statements a and b are true. 5) None of the above.Objects do not contain heat.
11
Which one of the following processes of heat transfer requires the presence of a fluid?convection
11
Which type of heating causes sunburn?radiation
11
Who demonstrated that when heat is gained or lost by a system during some process, the gain or loss can be accounted for by an equivalent quantity of mechanical work done on the system?Joule
12
A 1.0-kg chunk of ice at 0°C melts, absorbing 80 000 cal of heat in the process. Which of the following best describes what happens to this system?increased entropy
12
A 2.0-mol ideal gas system is maintained at a constant volume of 4.0 L. If 100 J of heat is added, what is the work done on the system?zero
12
A 2.00-kg block of ice is at STP (0°C, 1 atm) while it melts completely to water. What is its change in entropy? (For ice, Lf = 3.34 ´ 105 J/kg)2450 J/K
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