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Chapter 1: Problem 72
The radius of Earth is \(6378 . \mathrm{km}\). What is its circumference to three significant figures?
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Which of the following is the frequency of high C? a) \(376 \mathrm{~g}\) b) \(483 \mathrm{~m} / \mathrm{s}\) c) \(523 \mathrm{~Hz}\) d) 26.5 J
What is the ratio of the volume of a cube of side \(r\) to that of a sphere of radius \(r\) ? Does your answer depend on the particular value of \(r ?\)
Assuming that 1 mole \(\left(6.02 \cdot 10^{23}\right.\) molecules) of an ideal gas has a volume of \(22.4 \mathrm{~L}\) at standard temperature and pressure (STP) and that nitrogen, which makes up \(80.0 \%\) of the air we breathe, is an ideal gas, how many nitrogen molecules are there in an average \(0.500 \mathrm{~L}\) breath at STP?
Write this number in scientific notation: one hundred fifty-three million.
Find the magnitude and direction of \(-7 \vec{B}+3 \vec{A}\), where \(\vec{A}=(23.0,59.0), \vec{B}=(90.0,-150.0)\)
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