A 110-V hair dryer is rated at 1200 W. What current will it draw when operating from a 110-V electrical outlet?
A) 90 mA
B) 1.0 A
C) 5.0 A
D) 11 A
E) 14 A
Answer: D
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Which two quantities need to be measured in order to determine the density of a planet?
A) mass B) atmospheric composition C) radius D) A and B E) A and C
A plane is moving due north, directly towards its destination. Its airspeed is 200 mph. A constant breeze is blowing from west to east at 60 mph. At what rate is the plane moving north?
a. 198 mph c. 191 mph b. 196 mph d. 180 mph
Kepler's Laws: If NASA wants to put a satellite in a circular orbit around the sun so it will make 2.0 orbits per year, at what distance (in astronomical units, AU) from the sun should that satellite orbit? The earth's orbit is 1.0 AU from the sun.
A. 7.6 AU B. 0.63 AU C. 0.50 AU D. 2.0 AU E. 0.71 AU
Compared with the speed of light in a vacuum, the speed of light in the empty space between molecules in glass is
A) more. B) the same. C) less.