The area under a graph of vx vs. t from t = ti to t = tf represents
A.
B.
C.
D.
(xi + xf).E.
Answer: C
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Standing Waves on a String: What is the frequency of the fundamental mode of vibration of a steel piano wire stretched to a tension of 440 N? The wire is 0.600 m long and has a mass of 5.60 g.
A. 517 Hz B. 234 Hz C. 181 Hz D. 312 Hz E. 366 Hz
Over 20,000 stars are visible to the naked eye on the darkest, clearest nights
Indicate whether the statement is true or false
A typical E. coli bacterium is measured in microns. Which of the following is a representation of a micron?
A) 1 × 10-15 B) 1 × 10-12 C) 1 × 10-9 D) 1 × 10-6 E) 1 × 10-3
The orbits of most comets
A) have perihelions within the orbits of Mercury. B) are like the planets, fairly circular and in the ecliptic plane. C) lie almost entirely beyond the orbit of Neptune. D) go no farther out than Pluto, then return to the sun again. E) are shorter than the 76-year period for Comet Halley.