Direction: Write (v) if the statement is correct and (X) if the statement is incorrect. 1. The heat lost by one object equals the heat gained by another object. 2. Temperature indicates the direction in which heat flows while heat is the actual energy transferred. 3. Heat is the energy that transfer from a body of higher temperature to another body of lower temperature. _4. Heat is the quantity of kinetic energy absorbed or given off by a body. 5. Waste heat is the amount of heat that is not converted to into work. _6. Heat can increase the internal energy of an object as it excites the molecules when subjected to lower temperatures. _7. In measuring body temperature when you have a fever, the heat is flowing from the thermometer to the armpit. 8. Hot objects have high internal energy as the molecules in them are slow moving. _9. Energy transfer in the form of heat can result in the performance of work upon the system or the surroundings. 10. Absolute zero (OK) corresponds to -273° C.

Direction: Write (v) if the statement is correct and (X) if the statement is incorrect. 1. The heat lost by one object equals the heat gained by another object. 2. Temperature indicates the direction in which heat flows while heat is the actual energy transferred. 3. Heat is the energy that transfer from a body of higher temperature to another body of lower temperature. _4. Heat is the quantity of kinetic energy absorbed or given off by a body. 5. Waste heat is the amount of heat that is not converted to into work. _6. Heat can increase the internal energy of an object as it excites the molecules when subjected to lower temperatures. _7. In measuring body temperature when you have a fever, the heat is flowing from the thermometer to the armpit. 8. Hot objects have high internal energy as the molecules in them are slow moving. _9. Energy transfer in the form of heat can result in the performance of work upon the system or the surroundings. 10. Absolute zero (OK) corresponds to -273° C.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter14: Heat And Heat Transfer Methods

Section: Chapter Questions

Problem 53PE: A person inhales and exhales 2.00 L of 37.0C air, evaporating 4.00102g of water from the lungs and...

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(a) Calculate the rate of heat conduction through house walls that are 13.0 cm thick and that have an average thermal conductivity twice that of glass wool. Assume there are no windows or doors. The surface area of the walls is 120m2 and their inside surface is at 18.0C, while their outside surface is at 5.00C. (b) How many 1-kW room heaters would be needed to balance the heat transfer due to conduction?
A person inhales and exhales 2.00 L of 37.0C air, evaporating 4.00102g of water from the lungs and breathing passages with each breath. (a) How much heat transfer occurs due to evaporation in each breath? (b) What is the rate of heat transfer in watts if the person is breathing at a moderate rate of 18.0 breaths per minute? (c) If the inhaled air had a temperature of 20.0C, what is the rate of heat transfer for warming the air? (d) Discuss the total rate of heat transfer as it relates to typical metabolic rates. Will this breathing be a major form of heat transfer for this person?
Compare the SI units of specific heat and latent heat and explain any differences.
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. A 1,200-kg car going 25 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 20 kg of iron in the brakes and wheels absorbs the heat produced by the friction. (a) What was the car's original kinetic energy? (b) After the ear has stopped, what is the change in temperature of the brakes and wheels?
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Question 20 Which of the following is a reliable investigation to study how heat is transferred by conduction? A Investigating why the water in a pool heats up as the sun shines on it. B Investigating why the upstairs of a house is warmer than the basement. C Investigating why the handle of a pot will heat up as food is cooking over an open fire. D Investigating why the bottom of a loaf of bread browns faster than the top of a loaf of bread as an oven temperature is increased.