COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 14, Problem 14QAP
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Why in warm regions highway repair work is often completed in the summer months
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If the pronghorn had no way to exhaust heat to the environment, by how much would it’s body temperature increase during this run? ( In fact, it will lose some heat, so the rise won’t be this dramatic, but it will be quite noticeable, requiring adaptations that keep the pronghorns brain cooler than its body in such circumstances.) Assume the efficiency of the pronghorn to be equal to that of a human. Express your answer in kelvins.
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Chapter 14 Solutions
COLLEGE PHYSICS
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- If you add boiling water to a cup at room temperature, what would you expect the final equilibrium temperature of the unit to be? You will need to include 1he surroundings as pan of the system. Consider the zeroth law of thermodynamics.arrow_forwardGlobal 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_forwardWhat is the vapor pressure of solid carbon dioxide (dry ice) at _785 Figure 13.36 The phase diagram for carbon dioxide. The axes aha nonlinear, and the graph is not to scale. Dry ice is solid carbon dioxide and has a sublimation temperature ofarrow_forward
- Discuss some of the early developments in the field of thermometry that have led to the Fahrenheit and Celsius temperature scales currently in use today.arrow_forwardA gas follows on an isothermal curve, where p is the pressure, V is the volume, b is a constant, and c is a function of temperature. Show that a temperature scale under an isochoric process can be established with this gas and is identical to that of an ideal gas.arrow_forwardAs shown below, which is the phase diagram for carbon dioxide, what is the vapor pressure of solid carbon dioxide (dry ice) at -78.5 (Note that the axes in the figure ale nonlinear and the graph is not to scale.)arrow_forward
- An ideal diatomic gas at 80 K is slowly compressed adiabatically and reversibly to twice its volume. What is its final temperature?arrow_forwardConsider a container of nitrogen gas molecules at 900 K. Calculate (a) the most probable speed, (b) the average speed, and (c) the rms speed for the molecules. (d) State how your results compare with the values displayed in Figure 21.11.arrow_forwardHow can an object transfer heat if the object does not possess a discrete quantity of heat?arrow_forward
- Think about the drinking bird at the beginning of this section (Figure 15.21). Although the bird enjoys the theoretical maximum efficiency possible, it left to its own devices ever time, the bird will cease “drinking." What are some of the dissipative processes that might cause the bird's motion to cease? Figure 15.21 This novelty toy, known as the drinking bird, IS an example of Carnot's engine. It contains methylene chloride (mixed with a dye) in the abdomen, which boils at a very low temperature—about 100°F. To operate, one gets the bird's head wet. As the water evaporates, fluid moves up into the head, causing the bird to become top-heavy and dip forward back into the water. This cools down the methylene chloride in the head, and it moves back into the abdomen, causing the bird to become bottom heavy and tip up. Except for a very small Input of energy—the original head- wetting—the bird becomes a perpetual motion machine of sorts. (credit: Arabesk.nl, Wikimedia Commons)arrow_forwardOn 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_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
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