COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 14, Problem 74QAP
To determine
The new area of the sheet.
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Chapter 14 Solutions
COLLEGE PHYSICS
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- On a certain dry sunny day, a swimming pool 's temperature would rise by 1.50 if not for evaporation. What fraction of the water must evaporate to carry away precisely enough energy to keep the temperature constant?arrow_forwardIn times past, on a cold winter night, it was common to bring a hot object to bed with you. Which would keep you warmer through the cold night—a 10-kg iron brick or a 10-kg jug of hot water at the same temperature? Explain.arrow_forwardDoes it ever make sense to say that one object is "twice as hot" as another? Does it matter whether one is referring to Celsius or kelvin temperatures? Explain.arrow_forward
- At a spot in the high Andes, water boils at 80.0C, greatly reducing the cooking speed of potatoes, for example. What is atmospheric pressure at this location?arrow_forwardHow can an object transfer heat if the object does not possess a discrete quantity of heat?arrow_forwardSuppose a person is covered head to foot by wool clothing with average thickness of 2.00 cm and is transferring energy by conduction through the clothing at the rate of 50.0 W. What is the temperature difference across the clothing, given the surface area is 1.40 m2?arrow_forward
- What is the atmospheric pressure on top of Mt. Everest on a day when water boils there at a temperature at 70.0C ?arrow_forwardAt temperatures of a few hundred kelvins the specific heat capacity of copper approximately follows the empirical formula c=a+T+T2, where a=349J/kgK, =0.107J/kgK2, and =4.58105JkgK. How much heat is needed to raise the temperature of a 2.00-kg piece of copper from 20 to 250 ?arrow_forwardCondensation on a glass of ice water causes the ice to melt faster than it would otherwise. If 8.00 g of vapor condense on a glass containing both water and 200 g of ice, how many grams of the ice will melt as a result? Assume no other heat transfer occurs. Use Lvfor water at 37 as a better approximation than Lvfor water at 100 .)arrow_forward
- Global warming will produce rising sea levels partly due to melting ice caps and partly due to the expansion of water as average ocean temperatures rise. To get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00 C. Assume the column is not free to expand sideways. As a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to the surface can expand sideways onto land, and only to a limited degree. As another approximation, neglect the fact that ocean wan-ling is not uniform with depth.arrow_forwardThe height of the Washington Monument is measured to be 170 m on a day when the temperature is 35.0C. What will its height be on a day when the temperature falls to 10.0C ? Although the monument is made of limestone, assume that its thermal coefficient of expansion is the same as marble's.arrow_forwardReview. A 670-kg meteoroid happens to be composed of aluminum. When it is far from the Earth, its temperature is 15.0C and it moves at 14.0 km/s relative to the planet. As it crashes into the Earth, assume the internal energy transformed from the mechanical energy of the meteoroid-Earth system is shared equally between the meteoroid and the Earth and all the material of the meteoroid rises momentarily to the same final temperature. Find this temperature. Assume the specific heat of liquid and of gaseous aluminum is 1 170 J/kg C.arrow_forward
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