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Chapter 1: Q40P (page 11)
Using conversions and data in the chapter, determine the number of hydrogen atoms required to obtainof hydrogen. A hydrogen atom has a mass of .
The number of hydrogen atoms required to obtainof hydrogen is
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A ton is a measure of volume frequently used in shipping, but that use requires some care because there are at least three types of tons: A displacement ton is equal to 7 barrels bulk, a freight ton is equal to 8 barrels bulk, and a register ton is equal to 20 barrels bulk. A barrel bulk is another measure of volume: . Suppose you spot a shipping order for 鈥�73 tons鈥� ofcandies, and you are certain that the client who sent the order intended 鈥渢on鈥� to refer to volume (instead of weight or mass, as discussed in Chapter 5). If the client actually meant displacement tons, how many extra U.S. bushels of the candies will you erroneously ship if you interpret the order as (a) 73 freight tons and (b) 73 register tons? (U.S. bushels.)
Question: A gry is an old English measure for length, defined as 1/10 of a line, where line is another old English measure for length, defined as 1/12 inch. A common measure for length in the publishing business is a point, defined as 1/72 inch. What is an area of 0.50gry2in points squared (points2)
Question: Harvard Bridge, which connects MIT with its fraternities across the Charles River, has a length of 364.4 Smoots plus one ear. The unit of one Smoot is based on the length of Oliver Reed Smoot, Jr., class of 1962, who was carried or dragged length by length across the bridge so that other pledge members of the Lambda Chi Alpha fraternity could mark off (with paint) 1-Smoot lengths along the bridge. The marks have been repainted biannually by fraternity pledges since the initial measurement, usually during times of traffic congestion so that the police cannot easily interfere. (Presumably, the police were originally upset because the Smoot is not an SI base unit, but these days they seem to have accepted the unit.) Figure 1-4 shows three parallel paths, measured in Smoots (S), Willies (W), and Zeldas (Z). What is the length of 50.0 Smoots in (a) Willies and (b) Zeldas?
Figure 1-4Problem 8
An astronomical unit (AU) is equal to the average distance from Earth to the Sun, about . A parsec (pc) is the distance at which a length of 1 AU would subtend an angle of exactly 1 second of arc (Fig. 1-8). A light-year (ly) is the distance that light, traveling through a vacuum with a speed of , would cover in 1.0 year . Express the Earth 鈥� Sun distance in (a) parsecs and (b) light-years.
A certain gyroscope consists of a uniform disk with a radius mounted at the centre of an axle that islong and of negligible mass. The axle is horizontal and supported at one end. If the disk is spinning around the axle at, what is the precession rate?
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