A normal lapse rate of 3.5 °F/1000 ft is equivalent to
a. 3.5 °C/m.
b. 1.9 °C/1000 ft.
c. 3.5 °C/1000 ft.
d. 6.5 °C/1000 ft.
b
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A man is rotating on a frictionless platform at
a constant angular velocity when he suddenly extends his arms away from his sides. His speed of rotation will immediately slow down because a)his weight changes. b)his angular momentum must be conserved. c)am impulse has been applied. d)his angular velocity increases.
The wavelengths corresponding to the harmonics of a string with fixed ends can be found by saying that the length of the string must be equal to
A) an odd number of quarter-wavelengths. B) an odd number of third-wavelengths. C) an odd number of half-wavelengths. D) an integer number of half-wavelengths. E) an integer number of wavelengths.
Why does the intensity of waves from a small source decrease with the square of the distance from the source?
A) The waves run out of energy as they travel. B) The waves spread out as they travel. C) The medium through which the waves travel absorbs the energy of the waves. D) The waves slow down as they travel away from the source. E) The frequency of the waves decreases as they get farther from the source.
In a parallel universe, there is a planet with the same mass and radius as Earth. However, when an apple is dropped on this planet, it fall with an acceleration of 5 (meters per second) per second. The value of G in this parallel universe is
A. the same as it is in our universe B. twice as large as it is in our universe C. half as large as it is in our universe D. four times as large as it is in our universe