College Physics 10th. Edition by Philip W. Adams, Raymond J. Chastain, Hugh D. Young | 9781292112541 | 1292112549 | Holooly

College Physics

480 SOLVED PROBLEMS

Question: 16.6

Entropy and the Carnot cycle Let’s return to the Carnot engine in Example 16.2 (Section 16.6). The engine takes 2000 J of heat from a reservoir at 500 K, does some work, and discards some heat to a reservoir at 350 K. Find the total entropy change in the engine during one cycle. ...

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SET UP AND SOLVE During the isothermal expansion a...

Question: 23.CA.2

Laser beam demonstration When a laser beam is aimed at the wall of a lecture hall, every student in the class observes a red dot on the wall. What can you infer about the direction of the beam as it leaves the wall? A. The beam is reflected in all directions, an example of diffuse reflection. ...

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The fact that everyone in the class can see the do...

Question: 23.CA.5

Looking through the glass Figure 23.22 shows a setup in which two pairs of pins are separated by a block of glass. You observe the pins so that the ray reaching your eye passes through all the pins (Figure 23.22a). Which of the choices in Figure 23.22b represents the apparent position of the pins ...

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The actual position of the pins below the glass is...

Question: 8.2

Astronaut rescue In this example we will consider conservation of momentum in an isolated system consisting of an astronaut and a wrench. An astronaut is floating in space 100 m from her ship when her safety cable becomes unlatched. She and the ship are motionless relative to each other. The ...

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SET UP We choose a system consisting of the astron...

Question: 30.CA.5

Particle creation One reason a photon does not create an odd number of electrons plus positrons is that such a process would A. not conserve charge. B. not conserve energy. C. require photon energies that are not attainable. D. result in the creation of mass. ...

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One of the observed rules of nature is that during...

Question: 30.CA.4

Conservation of baryon number Which of the following reactions obeys the law of conservation of baryon number? A. n + p → n + p + p + p B. n + p → n + p + p ...

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In each case, the initial baryon number is 1 + 1 =...

Question: 30.9

Fuel consumption in a reactor About 200 MeV of energy is released in the fission of a uranium atom. Let’s use this fact to estimate how much uranium has to undergo fission per unit time to provide 3000 MW of thermal power. ...

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SET UP Each second, we need

\mathrm{3000 M...

Question: 30.8

An endoergic reaction Now let’s calculate the reaction energy for Rutherford’s experiment, described by Equation 30.11. ...

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SET UP As in Example 30.7, we use the rest masses ...

Question: 30.7

An exoergic reaction Now let’s use Equation 30.12 to calculate the reaction energy when lithium is bombarded by a proton and two alpha particles are produced. ...

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SET UP The reaction can be represented as

\...

Question: 30.6

Radioactivity in the air The average activity of air inside homes in the United States is about 1.5 pCi per liter. What is the average activity of a liter of air, in Bq? In decays per hour? ...

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SET UP We use the average value just cited, 1.5 pC...

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