1. The amount of money C, paid for a car varies inversely to its age in years t. If a 2 year-old car cost $20,000, how much will a 3 year old car cost? a]. $30,000 b]. $10,000 c]. $13333.33
2. When a car travels a fixed distance at a constant speed, the length of time traveled is inversely proportion to the rate r. If a driver usually makes a trip in 5 hours at an average speed of 65mph, what would the travel time be if her rate of travel was reduced to 55 mph? a]. k = 325 b]. 5.9 hours c]. 3.25 hours
3. The circumference of a circle equals 3.14 times the diameter. If the diameter is 12m, what is the circumference? a]. 37.68 m b]. 3.82 m c]. 15.14 m
4. Charles' Law tells us that the volume V of a gas at constant pressure is directly proportional to the temperature in degrees Kelvin (K).
A constant-volume gas thermometer has a pressure (absolute) of 891 Pa at 297oK. If the pressure increases to 1343Pa (absolute), what is the new temperature in degrees K? Hint: Find the value of k, then use Charles' Law.
Question courtesy of Dr. John Zelinsky. a]. 3oK b]. 448oK c]. 99oK
5. Boyle's Law states that pressure and volume for a gas are inversely related for a gas at a fixed temperature.
Air in a balloon has a volume of .175 m3 and exerts a pressure of 1.43*105 Pa(absolute).If the volume changes to .194 m3, what is the new pressure (absolute) ? Assume the temperature remains constant. Hint: Find the value of k, then use Boyle's Law.
Question courtesy of Dr. John Zelinsky.
a]. 1.29*105 Pa b]. 25025 Pa c]. 1.74*105 Pa
6. The period T of a pendulum is proportional to the square root of its length L. If the period of a 4m pendulum 114s, what is the period of a 36m pendulum?
a]. k = 57
b]. 342 s
c]. 6 sec
Copyright © 2006 Donna Tupper.
