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Chapter 1: Q59. (page 20)
One mole of atoms consists of individual atoms. If a mole of atoms were spread uniformly over the Earth鈥檚 surface, how many atoms would there be per square meter?
There would be over the surface of the Earth.
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Express the following using the prefixes of Table 1鈥�4:
(a)
(b)
(c)
(d)
(e)
What, approximately, is the percent uncertainty for a measurement given as?
Time intervals measured with a stopwatch typically have an uncertainty of about 0.2 s due to human reaction time at the start and stop moments. What is the percent uncertainty of a hand-timed measurement of (a) 5.5 s, (b) 55 s, (c) 5.5 min?
Estimate how long it would take one person to mow a football field using an ordinary home lawnmower (Fig. 1-15). (State your assumption, such as the mower moves with a 1 km/h speed and has a 0.5 m width.)
(Note: Remember that for rough estimates, only round numbers are needed both as input to calculations and as final results.)
Express the sine ofwith the correct number of significant figures.
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