A string with fixed ends is made to go into standing wave patterns. At a given tension, the lowest frequency for which such a pattern exists is 150 Hz. Which of the following frequencies would also cause a standing wave pattern in this case?
a. 250 Hz
b. 500 Hz
c. 750 Hz
d. All of the above frequencies will cause a standing wave pattern in this case.
c
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Which of the following is the era sometimes called the age of reptiles?
a. Mesozoic b. Paleozoic c. Cenozoic d. Phanerozoic
According to Newton's Law of Gravitation, if the distance between two bodies is doubled the attractive force between them becomes
A. half as large. B. one quarter as large. C. twice as large. D. four times as large. E. unchanged.
The aberration of starlight gives proof that Earth is
a. rotating. b. revolving. c. precessing. d. none of these.
The molecular mass for chlorine is not an integer multiple of the molecular mass of hydrogen but is about 35.5 times the molecular mass of hydrogen. This is primarily because:
a. of the binding energy of the chlorine nucleus. b. there are different isotopes of chlorine. c. the chlorine nucleus has 35.5 nucleons. d. the proton and neutron have different masses.