Which process will double the power given off by a resistor?
a. doubling the current while making the voltage half as big
b. doubling the current while doubling the resistance
c. doubling the current by doubling the voltage
d. doubling the current by making a resistance half as big
D
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A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?
A) 1.2 A B) 2.5 A C) 4.9 A D) 7.6 A E) 9.8 A
How many neutrons are in a 
nucleus?
A. 79 B. 179 C. 118 D. Some other number (specify)
A gamma ray is another name for a(n) __________
Fill in the blank(s) with correct word
A mass attached to a spring vibrates back and forth. At the equilibrium position, the
A) velocity reaches zero. B) acceleration reaches a maximum. C) net force reaches a maximum. D) velocity reaches a maximum.