What is the frequency of a wave if its period is 0.25 seconds?
A. 1.0 Hz
B. 0.25 Hz
C. 12 Hz
D. 4.0 Hz.
Ans: D. 4.0 Hz.
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Fill in the blank(s) with correct word
The time the Moon takes to orbit the Earth one time is the same amount of time as the lunar phase cycle
a. True b. False Indicate whether the statement is true or false
Faraday's Law: A flat coil having 160 turns, each with an area of 0.20 m2, is placed with the plane of its area perpendicular to a magnetic field of 0.40 T. The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0 s. If the resistance of the coil is 16 ?, at what rate is power generated in the coil during this change?
A. 5.0 W B. 10 W C. 15 W D. 20 W
A 200-kg spacecraft is launched to the Moon. While in orbit around the Moon, its weight is ________.
A. zero B. 200 kg C. about 1/6 its weight on Earth D. The answer depends on how close to the Moon the ship is orbiting.