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Chapter 1: Problem 21
How many cubic centimeters are in a cubic meter?
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When we write the number 3.6 as typical of a number with two significant figures, we're saying that the actual value is closer to 3.6 than to 3.5 or \(3.7 ;\) that is, the actual value lies between 3.55 and \(3.65 .\) Show that the percent uncertainty implied by such twosignificant-figure precision varies with the value of the number, being the lowest for numbers beginning with 9 and the highest for numbers beginning with \(1 .\) In particular, what is the percent uncertainty implied by the numbers (a) \(1.1,\) (b) \(5.0,\) and (c) \(9.9 ?\)
Making a turn, a jetliner flies \(2.1 \mathrm{km}\) on a circular path of radius \(3.4 \mathrm{km} .\) Through what angle does it turn?
The diameter of a hydrogen atom is about \(0.1 \mathrm{nm},\) and the diameter of a proton is about \(1 \mathrm{fm} .\) How many times bigger than a proton is a hydrogen atom?
Why doesn't Earth's rotation provide a suitable time standard?
Add \(3.63105 \mathrm{m}\) and \(2.13103 \mathrm{km}\).
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