Physics for Scientists and Engineers
Physics for Scientists and Engineers
10th Edition
ISBN: 9781337553278
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Chapter 1, Problem 33AP

Bacteria and other prokaryotes are found deep underground, in water, and in the air. One micron (10−6 m) is a typical length scale associated with these microbes. (a) Estimate the total number of bacteria and other prokaryotes on the Earth. (b) Estimate the total mass of all such microbes.

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Bacteria and other prokaryotes are found deep underground, in water, and in the air. One micron (10-6 m) is a typical length scale associated with these microbes. (a) Estimate the total number of bacteria and other prokaryotes onthe Earth. (b) Estimate the total mass of all such microbes.
(a) What is the order of magnitude of the number of micro organisms in the human intestinal tract? A typical bacterial length scale is 10-6 m. Estimate the intestinal volume and assume 1% of it is occupied by bacteria. (b) Does the number of bacteria suggest whether the bacteria are beneficial, dangerous, or neutral for the human body? What functions could they serve?
A scientist performs an experiment on all 8 planets in the solar system by comparing the lengths of the strips of paper tape required to record 10 data points. Therefore, which would we find that: A) The longest strip of paper is required for the planet: ?  B) The shortest strip of paper is required for the planet: ? 8 Planets are Saturn, Earth, Venus, Uranus, Mars, Neptune, Jupiter, Mercury

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