College Physics 9th. Edition by Hugh D. Young | 9780321733177 | 321733177 | Holooly

College Physics

477 SOLVED PROBLEMS

Question: 30.CA.5

One reason a photon could 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

Suppose a person who has one hand in a wide beam of x rays receives an equivalent dose of 90 millirem in 30 sec. If the person puts both hands in this beam, side by side, for 30 sec, then the equivalent dose the person will receive is A. 180 millirem, because twice the number of ions will be ...

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The millirem is related to the number of molecules...

Question: 30.CA.3

A pure sample of a radioactive substance in a container has a half-life of 1 h. Which of the following statements is or are true? A. After 1 h, half of the atoms will have decayed, and the remainder will decay in the next 1 h. B. After 1 h, half of the atoms will have decayed, and half of the ...

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During a half-life, half of the sample of the elem...

Question: 30.QA.2

An element of atomic number 84 decays radioactively to an element of atomic number 83. Which of the following emissions achieves this result? A. alpha particle only. B. beta particle only. C. alpha particle plus beta particle. ...

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A change in atomic number from 84 to 83 means that...

Question: 30.CA.1

Which, if any, of the following statements concerning the nuclear force are false? A. The nuclear force is a very short-range force. B. The nuclear force is attractive. C. The nuclear force acts on both protons and neutrons. ...

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All of the preceding statements about the nuclear ...

Question: 30.EX.10

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

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SET UP AND SOLVE In each case, the initial baryon ...

Question: 30.EX.9

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 3000 MJ, or 3000 × 10[...

Question: 30.EX.8

Find the reaction energy for Rutherford’s experiment, described by Equation 30.12. ...

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

Question: 30.EX.7

When lithium is bombarded by a proton, two alpha particles are produced. Find the reaction energy Q. ...

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SET UP The reaction can be represented as

{...

Question: 30.EX.6

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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