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Chapter 2: Problem 60
A ruler is marked in intervals of \(1 / 8\) in. To what fraction of an inch can you estimate a measurement?
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Dieters are often told that drinking ice-cold water burns more energy than drinking roomtemperature water. Why is this true?
Indicate the number of significant zeros in each value: (a) \(2.300\) (b) \(2.3003\) (c) \(0.0023\) (d) 2300 (e) \(23.000\)
What mass of each substance occupies a volume of \(50.0 \mathrm{~mL} ?\) (Densities are shown in parentheses.) (a) Lead \((11.4 \mathrm{~g} / \mathrm{mL})\) (b) Ethanol \((0.785 \mathrm{~g} / \mathrm{mL})\) (c) Oxygen gas \(\left(1.4 \times 10^{-3} \mathrm{~g} / \mathrm{mL}\right)\) (d) Hydrogen gas \(\left(8.4 \times 10^{-5} \mathrm{~g} / \mathrm{mL}\right)\) (e) Mercury (13.6 g/mL) (f) Gold \((19.3 \mathrm{~g} / \mathrm{mL})\)
Why is it necessary for a calorimeter to be insulated?
Convert: (a) \(72{ }^{\circ} \mathrm{F}\) to \({ }^{\circ} \mathrm{C}\) and \(\mathrm{K}\) (b) \(-12{ }^{\circ} \mathrm{C}\) to \({ }^{\circ} \mathrm{F}\) and \(\mathrm{K}\) (c) \(178 \mathrm{~K}\) to \({ }^{\circ} \mathrm{F}\) and \({ }^{\circ} \mathrm{C}\)
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