1. Write the following quantities in standard units.
(a) 0.66 Ms
(b) 3.5 km
(c) 27 mg
(d) 125 cm
2. Compute, in centimeters and meters, the height of a basketball player 6 ft 4 in tall.
3. Is the following statement reasonable?
It took 380 L of gasoline to fill up the car's tank.
4. A car travels through a school zone at a speed of 33 km/h. Was the 25 mi/h speed limit exceeded?
5. Compute the density in g/cm3 of a piece of metal that has a mass of 0.425 kg and a volume of 78 cm3.
6. Round off the following numbers to two significant figures.
(a) 93.23
(b) 0.00105
(c) 9356
(d) 0.000414
7. What is the result of (3.51 m 1.62 m)/0.22 m with the proper number of significant figures?
8. A space probe on the surface of Mars sends a radio signal back to the Earth, a distance of 8.39 107 km. Radio waves travel at the speed of light (3.00 108 m/s). How many seconds does it take for the signal to reach the Earth?
9. A student drives the 100 mi trip back to campus after spring break and travels with an average speed of 57 mi/h for 1 hour and 30 minutes.
(a) What distance was traveled during this time?
(b) Traffic gets heavier, and the last part of the trip takes another half-hour. What was the average speed during this leg of the trip?
(c) Find the average speed for the total trip.
10. At a track meet, a runner runs the 100 m dash in 11 s. What was the runner's average speed?