Which process will double the power given off by a resistor?
a. doubling the current while doubling the resistance
b. doubling the current by making a resistance half as big
c. doubling the current by doubling the voltage
d. doubling the current while making the voltage half as big
b
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How can Jupiter have such a strong magnetic field?
What will be an ideal response?
The amount of current in an incandescent bulb rated 75W 120V is about
A) 0.4 A. B) 0.6 A. C) 1.2 A. D) more than 1.2 A.
A pendulum is made with a 4.00 kg mass suspended at the end of a 75.0 cm thin rod. The period of the small motion simple harmonic motion is
A. 2.45 sec. B. 2.01 sec. C. 1.74 sec. D. 1.33 sec. E. 1.04 sec.
Why are many of the newly detected extrasolar planets called "hot Jupiters"?
A) Their masses and composition are similar to what we would expect if Jupiter were hotter. B) The planets tend to be detected around more massive, hotter stars than our Sun. C) Their masses are similar to Jupiter but they are very close to the central star and therefore hot. D) Their masses are similar to Jupiter but their composition is similar to Mercury. E) The discovery of other planets is very exciting.