General Physics, 2nd Edition
2nd Edition
ISBN: 9780471522782
Author: Morton M. Sternheim
Publisher: WILEY
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Chapter 30, Problem 3E
To determine
The effective half-lifefor
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General Physics, 2nd Edition
Ch. 30 - Prob. 1RQCh. 30 - Prob. 2RQCh. 30 - Prob. 3RQCh. 30 - Prob. 4RQCh. 30 - Prob. 5RQCh. 30 - Prob. 6RQCh. 30 - Prob. 7RQCh. 30 - Prob. 8RQCh. 30 - Prob. 9RQCh. 30 - Prob. 10RQ
Ch. 30 - Prob. 11RQCh. 30 - Prob. 12RQCh. 30 - Prob. 1ECh. 30 - Prob. 2ECh. 30 - Prob. 3ECh. 30 - Prob. 4ECh. 30 - Prob. 5ECh. 30 - Prob. 7ECh. 30 - Prob. 8ECh. 30 - Prob. 9ECh. 30 - Prob. 10ECh. 30 - Prob. 11ECh. 30 - Prob. 12ECh. 30 - Prob. 13ECh. 30 - Prob. 14ECh. 30 - Prob. 15ECh. 30 - Prob. 16ECh. 30 - Prob. 17ECh. 30 - Prob. 18ECh. 30 - Prob. 19ECh. 30 - Prob. 20ECh. 30 - Prob. 21ECh. 30 - Prob. 22ECh. 30 - Prob. 23ECh. 30 - Prob. 24ECh. 30 - Prob. 25ECh. 30 - Prob. 26ECh. 30 - Prob. 27ECh. 30 - Prob. 28ECh. 30 - Prob. 29ECh. 30 - Prob. 30ECh. 30 - Prob. 31ECh. 30 - Prob. 32ECh. 30 - Prob. 33ECh. 30 - Prob. 34ECh. 30 - Prob. 35ECh. 30 - Prob. 36ECh. 30 - Prob. 37ECh. 30 - Prob. 38ECh. 30 - Prob. 39ECh. 30 - Prob. 40ECh. 30 - Prob. 41ECh. 30 - Prob. 42ECh. 30 - Prob. 43ECh. 30 - Prob. 44ECh. 30 - Prob. 46ECh. 30 - Prob. 47ECh. 30 - Prob. 48ECh. 30 - Prob. 49ECh. 30 - Prob. 51ECh. 30 - Prob. 52ECh. 30 - Prob. 53ECh. 30 - Prob. 54ECh. 30 - Prob. 55ECh. 30 - Prob. 56ECh. 30 - Prob. 57ECh. 30 - Prob. 58ECh. 30 - Prob. 59ECh. 30 - Prob. 60ECh. 30 - Prob. 61ECh. 30 - Prob. 62ECh. 30 - Prob. 63ECh. 30 - Prob. 64ECh. 30 - Prob. 65E
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- Data from the appendices and the periodic table may be needed for these problems. A 5000Ci 60Co source used for cancer therapy is considered too weak to be useful when its activity falls to 3500 Ci. How long after its manufacture does this happen?arrow_forwardTo obtain the most precise value of BE from the equation BE=[ZM(1H)+Nmn]c2m(AX)c2, we should take into account the binding energy of the electrons in the neutral atoms. Will doing this produce a larger or smaller value for BE? Why is this effect usually negligible?arrow_forward(a) Calculate the radius of 58Ni, one of the most tightly bound stable nuclei. (b) What is the ratio of the radius of 58Ni to that at 258Ha, one of the largest nuclei ever made? Note that the radius of the largest nucleus is still much smaller than ?le size of an atom.arrow_forward
- In a 3109 yearold rock that originally contained some 238U, which has a halflife of 4.5109 years, we expect to find some 238U remaining in it. Why are 226Ra, 222Rn, and 210Po also found in such a rock, even though they have much shorter halflives (1600 years, 3.8 days, and 133 days, respectively)?arrow_forwardData from the appendices and the periodic table may be needed for these problems. Unreasonable Results (a) Repeat Exercise 31.57 but include the 0.0055% natural abundance of 234U with its 2.45105y halflife. (b) What is unreasonable about this result? (c) What assumption is responsible? (d) Where does the 234U come from if it is not primordial?arrow_forwardData from the appendices and the periodic table may be needed for these problems. 50V has one of the longest known radioactive halflives. In a difficult experiment a researcher found that the activity of 1.00 kg of 50V is 1.75 Bq. What is the halflife in years?arrow_forward
- The RBE for lowenergy s is 1.7, whereas that for higher-energy s is only 1. Explain why, considering how the range of radiation depends on its energy.arrow_forward(a) Calculate the number of grams of deuterium in an 80.000L swimming pool, given deuterium is 0.0150% of natural hydrogen. (b) Find the energy released in joules if this deuterium is fused via the reaction 2H+2H3He+n. (c) Could the neutrons be used to create more energy? (d) Discuss the amount of this type of energy in a swimming pool as compared to that in, say, a gallon of gasoline, also taking into consideration that water is far more abundant.arrow_forwardThe particles emitted in the decay of 3H (tritium) interact with matter to create light in a glow- in-the-dark exit sign. At the time of manufacture, such a sign contains 15.0 Ci of 3H. (a) What is the mass of the tritium? (b) What is its activity 5.00 y after manufacture?arrow_forward
- Data from the appendices and the periodic table may be needed for these problems. (a) Natural potassium contains 40K, which has a halflife of 1.277109y. What mass of 40K in a person would have a decay rate of 4140 Bq? (b) What is the fraction of 40K in natural potassium, given that the person has 140 g in his body? (These numbers are typical for a 70kg adult.)arrow_forwardFind the radiation dose in Gy for: (a) A 10mSv fluoroscopic xray series. (b) 50 mSv of skin exposure by an emitter. (c) 160 mSv of and rays from the 40K in your body.arrow_forwardData from the appendices and the periodic table may be needed for these problems. Show that the activity of the 14C in 1.00 g of 12C found in living tissue is 0.250 Bq.arrow_forward
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