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BIO Estimate the number of atoms in your body. (Hint:

University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman ISBN: 9780321675460 31

Solution for problem 61P Chapter 1

University Physics | 13th Edition

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University Physics | 13th Edition | ISBN: 9780321675460 | Authors: Hugh D. Young, Roger A. Freedman

University Physics | 13th Edition

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Problem 61P

BIO Estimate the number of atoms in your body. (?Hint?: Based on what you know about biology and chemistry, what are the most common types of atom in your body? What is the mass of each type of atom? Appendix D gives the atomic masses of different elements, measured in atomic mass units; you can find the value of an atomic mass unit, or 1 u, in Appendix E.)

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Solution 61P The most common types of atoms in our body is oxygen and hydrogen. Now since the hydrogen atoms are very light, we can consider that body is mainly made by oxygen. Now the mass of oxygen is 16 u = 16 × (1.66 × 10 27 kg) = 2.66 × 10 26kg. The average mass of a person is around 60 kg. 60 kg So the number of atoms in the body is then n = 26 = 2.26 × 10 27. 2.66×10 kg 27 So the number of atoms in our body is of the order of 10 number.

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Chapter 1, Problem 61P is Solved
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Textbook: University Physics
Edition: 13
Author: Hugh D. Young, Roger A. Freedman
ISBN: 9780321675460

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BIO Estimate the number of atoms in your body. (Hint: