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Chapter 1: Problem 43

The average speed of helium at \(25^{\circ} \mathrm{C}\) is \(1255 \mathrm{~m} / \mathrm{s}\) Convert this speed to miles per hour (mph).

Short Answer

Expert verified
The average speed of helium at \(25^{\circ} \mathrm{C}\) is approximately \(2808\) mph.

Step by step solution

01

Convert meters to miles

1 mile is approximately equivalent to \(1609.34\) meters. Therefore, the speed in miles can be calculated by dividing the speed by \(1609.34\). This gives \(1255 \, \mathrm{m} / \mathrm{s} \, \div \, 1609.34 \, \mathrm{m/mile} = 0.78 \, \mathrm{miles/s}\).
02

Convert seconds to hours

There are \(3600\) seconds in one hour. Hence, the speed in miles per hour is calculated by multiplying the speed in miles per second by \(3600\). So, \(0.78 \, \mathrm{miles/s} \, \times \, 3600 \, \mathrm{s/hour} = 2808 \, \mathrm{miles/hour}\).

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Most popular questions from this chapter

What is the mass of one mole of ants? (Useful information: A mole is the unit used for atomic and subatomic particles. It is approximately \(6 \times 10^{23}\). A \(1-\mathrm{cm}\) -long ant weighs about \(3 \mathrm{mg}\).

A pycnometer is a device for measuring the density of liquids. It is a glass flask with a close-fitting ground glass stopper having a capillary hole through it. (a) The volume of the pycnometer is determined by using distilled water at \(20^{\circ} \mathrm{C}\) with a known density of \(0.99820 \mathrm{~g} / \mathrm{mL}\). First, the water is filled to the rim. With the stopper in place, the fine hole allows the excess liquid to escape. The pycnometer is then carefully dried with filter paper. Given that the masses of the empty pycnometer and the same one filled with water are \(32.0764 \mathrm{~g}\) and \(43.1195 \mathrm{~g},\) respectively, calculate the volume of the pycnometer. (b) If the mass of the pycnometer filled with ethanol at \(20^{\circ} \mathrm{C}\) is \(40.8051 \mathrm{~g},\) calculate the density of ethanol. (c) Pycnometers can also be used to measure the density of solids. First, small zinc granules weighing \(22.8476 \mathrm{~g}\) are placed in the pycnometer, which is then filled with water. If the combined mass of the pycnometer plus the zinc granules and water is \(62.7728 \mathrm{~g}\). what is the density of zinc?

Write the numbers represented by the following prefixes: (a) mega-, (b) kilo- (c) deci-, (d) centi-, (e) milli-, (f) micro- (g) nano- (h) pico-

Convert the following temperatures to degrees Celsius or Fahrenheit: (a) \(95^{\circ} \mathrm{F}\), the temperature on a hot summer day; (b) \(12^{\circ} \mathrm{F},\) the temperature on a cold winter day; (c) a \(102^{\circ} \mathrm{F}\) fever; (d) a furnace operating at \(1852^{\circ} \mathrm{F} ;\) (e) \(-273.15^{\circ} \mathrm{C}\) (theoretically the lowest attainable temperature).

A 6.0 -ft person weighs 168 ib. Express this person's height in meters and weight in kilograms. (1 Ib = \(453.6 \mathrm{~g} ; 1 \mathrm{~m}=3.28 \mathrm{ft} .)\)
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