The amount of heat energy a refrigerator removes from the food stored inside it is ___________ the amount of electrical energy required to run the refrigerator
a. equal to c. less than
b. greater than d. unrelated to
B
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A horizontal uniform meter stick supported at the 50-cm mark has a mass of 0.50 kg hanging from it at the 20-cm mark and a 0.30 kg mass hanging from it at the 60-cm mark. Determine the position on the meter stick at which one would hang a third mass of 0.60 kg to keep the meter stick balanced
a. 74 cm b. 70 cm c. 65 cm d. 86 cm e. 62 cm
Which travels fastest in a vacuum?
A) radio waves B) light C) X-rays D) all the same
If a = 3.0 mm, b = 4.0 mm, Q1 = 60 nC, Q2 = 80 nC, and q = 32 nC in the figure, what is the magnitude of the electric force on q?
a.
1.6 N
b.
1.3 N
c.
1.9 N
d.
2.2 N
e.
0.040 N
A pendulum when on Earth has a period of 1.00 s. When transported to the moon, where the gravitational acceleration is 1/6 that on Earth, the period of the pendulum would be:
A. 4.1 s B. 1.00 s C. 2.4 s D. 4.1 s