If one doubles the tension in a violin string, the fundamental frequency of that string will be how many times the original frequency?
A) 4
B) 2
C)
D)
E) 23
C
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Refracting Telescope: You have a choice between two lenses of focal lengths fa and fb, where fb = 2fa, to use as the objective lens in building a refracting telescope. If the magnification you obtain using lens a is Ma, what will be the magnification when using lens b?
A. Mb = 2 Ma B. Mb = 4 Ma C. Mb = 8 Ma D. Mb = Ma/4 E. Mb = Ma/2
If you were living in South America (i.e. in the Southern hemisphere):
A) the Sun would never set in July. B) there would be no seasons. C) it would be warmer in December than in July. D) it would snow in December and be sunny in July. E) days would be longer in July than in December.
Rutherfordium-261 has a half-life of 1.08 min. How long will it take for a sample of rutherfordium to lose one-third of its nuclei?
A) 1.02 min B) 1.62 min C) 0.63 min D) 2.70 min E) 3.24 min
NASA satellites stay up because
A) they are moving so fast that they are able to "fall" around Earth. B) their rocket engines hold them above Earth's surface. C) there is no air resistance in outer space and thus no downward force on an orbiting satellite. D) they are away from Earth's gravity and thus do not get pulled down toward Earth. E) centrifugal force pulls outward on them.