Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 7th Global Edition
1
Introduction, Measurement, Estimating
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1-4: Measurement, Uncertainty, Significant Figures
1-5 and 1-6: Units, Standards, SI, Converting Units
1-7: Order-of-Magnitude Estimating
1-8: Dimensions

Problem 22
A
a) 5×1011 protons/bacterium5 \times 10^{11} \textrm{ protons/bacterium}
b) 5×109 protons/DNA5 \times 10^9 \textrm{ protons/DNA}
c) 5×1028 protons/human5 \times 10^{28} \textrm{ protons/human}
d) 5×1067 protons/galaxy5 \times 10^{67} \textrm{ protons/galaxy}
Giancoli 7th "Global" Edition, Chapter 1, Problem 22 solution video poster
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