Devil's Tower National Monument is 1280 ft high. Convert this height to meters.
[Ques. 2] Which of these statements about the poles of magnets is correct?
a. Like poles repel; unlike poles attract.
b. Like poles attract; unlike poles repel.
c. Unlike poles attract; like poles have no effect.
d. All poles repel.
e. All poles attract.
[Ques. 3] The Gateway Arch in St. Louis, Missouri is 630 feet tall. Express this distance in meters and in kilometers.
[Ques. 4] What is one thing that electrical engineers do to minimize power loss between the plant and your home?
a. Increase the resistance in the wires between the two as much as possible.
b. Use thinner wires.
c. Coil the wire to increase the distance between the two.
d. Lower the resistance between the two as much as possible.
e. Build parallel circuits to take pressure off the generators.
[Ques. 5] A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting from rest. The acceleration of the racecar is __________.
Fill in the blank(s) with correct word
[Ques. 6] Which is the most expensive source of electric power in common use today?
a. nuclear power
b. standard batteries
c. alkaline batteries
d. watch batteries
e. hydroelectric power
[Ques. 7] A racecar driver steps on the gas, changing his speed from 10 m/s to 30 m/s in 4 seconds. The acceleration of the racecar is _________.
Fill in the blank(s) with correct word
[Ques. 8] What units do most electric companies bill in?
a. joule-hours
b. kilowatt-hours
c. ohm-hours
d. ampere-hours
e. watts per ampere
[Ques. 9] A racecar goes around a 200 m radius curve at a constant speed of 40 m/s. Its acceleration is __________.
Fill in the blank(s) with correct word
[Ques. 10] Which unit is a unit of power?
a. The volt.
b. The ampere.
c. The ohm.
d. The watt.
e. The joule.
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