A string with a mass per length of 2.00 gm/m is stretched with a force of 120 N between two points that are 0.400 m apart. The fundamental frequency of the stretched string is in tune with the frequency of the second mode of an organ pipe filled with air and open at both ends. The velocity of sound in air at 0
is 331 m/s. If the temperature of the air decreases by 20
then what is the length of the organ pipe?
A. 75.0 cm
B. 100 cm
C. 125 cm
D. 150 cm
E. 175 cm
B. 100 cm
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Mars's atmosphere has reduced because of the _____
A) lack of an ozone layer in Mars B) high escape velocity of Mars C) high air pressure of Mars D) lack of carbon dioxide in Mars's air
The last quarter phase of the Moon:
A) rises at sunrise. B) sets at sunrise. C) crosses the meridian at sunrise. D) rises at sunset. E) sets at sunset.
For dilute concentrations of point defects, the scattering distance for free electrons is _________related to the concentration of point defects.
Fill in the blank(s) with the appropriate word(s).
Apart from the effects of other planets, the orbit of Mercury precesses because
A) Mercury travels faster than any other planet. B) Mercury's orbit is nearly circular. C) of pronounced variations in Mercury's orbit about the Sun.