1. The decay of radioactive substance is given by 7 N = Noe (1), where N is the number of atoms present at time t, No is the initial number of atoms and T is the exponential decay constant, which is related to the decay rate of the element. The N 1 half-life thalf is the time required for the number to atoms to decay by half ( = No 2 Solve for thalf starting from equation (1) in terms of T. Note: Use MathType to enter in T. Do not use the letter "T" from the keyboard. Don't forget the multiplication sign between variables. Use the asterisk symbol (*) for multiplication or the multiplication symbol in the math editor (orange box). thalf = 0.693 X√ S No, that's not the correct answer.

1. The decay of radioactive substance is given by 7 N = Noe (1), where N is the number of atoms present at time t, No is the initial number of atoms and T is the exponential decay constant, which is related to the decay rate of the element. The N 1 half-life thalf is the time required for the number to atoms to decay by half ( = No 2 Solve for thalf starting from equation (1) in terms of T. Note: Use MathType to enter in T. Do not use the letter "T" from the keyboard. Don't forget the multiplication sign between variables. Use the asterisk symbol (*) for multiplication or the multiplication symbol in the math editor (orange box). thalf = 0.693 X√ S No, that's not the correct answer.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Nuclear Physics

Section: Chapter Questions

Problem 34P

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What fraction of a radioactive sample has decayed after two half-lives have elapsed?
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1. The decay of radioactive substance is given by - t N = Noe (1), where N is the number of atoms present at time t, No is the initial number of atoms and 7 is the exponential decay constant, which is related to the decay rate of the element. The half-life thalf is the N 1 time required for the number to atoms to decay by half ( No 2 Solve for thalf starting from equation (1) in terms of T. Note: Use MathType to enter in T. Do not use the letter "T" from the keyboard. Don't forget the multiplication sign between variables. Use the asterisk symbol (*) for multiplication or the multiplication symbol in the math editor (orange box). thalf S
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