Physics for Scientists and Engineers with Modern Physics
Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 43, Problem 1P

(a)

To determine

The order of magnitude of number of protons in human body.

(a)

Expert Solution
Check Mark

Answer to Problem 1P

The order of protons in human body is 1028.

Explanation of Solution

A human body is mostly composed of water. In water molecule there are 8 protons and 10 neutrons. Thus the order of proton and neutron in a human body is almost same.

Consider an average human body composed of 35kg proton and 35kg neutrons.

Write the number of nucleon.

    n=mnM

Here, n is the number of nucleons, mn is the average mass of a nucleon, M is mass.

Conclusion:

Substitute 35kg for M, 1.67×1027kg for mn to determine the number of the nucleons.

    n=35 kg1.67×1027 kg1028

The order of protons in human body is 1028.

(b)

To determine

The order of magnitude of number of neutrons in human body.

(b)

Expert Solution
Check Mark

Answer to Problem 1P

The order of neutron in human body is 1028.

Explanation of Solution

A human body is mostly composed of water. In water molecule there are 8 protons and 10 neutrons. Thus the order of proton and neutron in a human body is almost same.

Thus the order of neutron in human body is 1028.

Conclusion:

The order of neutron in human body is 1028.

(c)

To determine

The order of magnitude of number of electrons in human body.

(c)

Expert Solution
Check Mark

Answer to Problem 1P

The order of electrons in human body is 1028.

Explanation of Solution

A human body is mostly composed of water. In water molecule the number of protons and electrons are exactly same. Thus the order of number of electrons will be same as the order of proton in human body.

The order of electrons in human body is 1028.

Conclusion:

The order of electrons in human body is 1028.

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