Calculate the linear speed due to the Earth's rotation for a person at 40° north latitude on the Earth. The radius of the Earth is 6.40 × 10^6 m
a. 74.0 m/s
c. 465 m/s
b. 356 m/s
d. 73.0 m/s
B
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When an unstable nucleus decays by emitting an alpha particle, the atomic number of the nucleus
A) increases by 4. B) increases by 2. C) decreases by 2. D) decreases by 4. E) remains unchanged.
Inward migration is a hypothesis used to explain why
A) Jupiter-sized planets are seen orbiting close to some stars B) some stars do not have Jupiter-sized planets C) some stars do not have planets at all D) Terrestrial-sized planets are seen orbiting far from some stars
If C = 14 µF, what is the equivalent capacitance for the combination shown?
a.
28 µF
b.
17 µF
c.
0.29 µF
d.
7.0 µF
e.
?670 µF
General Questions: A fireman is sliding down a fire pole. As he speeds up, he tightens his grip on the pole, thus increasing the vertical frictional force that the pole exerts on the fireman. When the force on his hands equals his weight, what happens to the fireman?
A. The fireman comes to a stop. B. The fireman descends with slower and slower speed. C. The fireman descends with a smaller but non-zero acceleration. D. The fireman continues to descend, but with constant speed. E. The acceleration of the fireman is now upward.