A car is 200 m from a stop sign and traveling toward the sign at 40.0 m/s. If the driver realizes they must stop the car at this time. It takes 0.20 s for the driver to apply the brakes
What must the constant acceleration of the car be after the brakes are applied so that the car would come to rest at the stop sign? A)
2.89 m/s2
B)
3.89 m/s2
C)
4.17 m/s2
D)
3.42 m/s2
E)
2.08 m/s2
C
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The wavelengths corresponding to the harmonics of an organ pipe that is open at one end and closed at the other can be found by saying that the length of the pipe 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.
Earth's lower atmosphere is warm because of
A) incoming solar radiation. B) terrestrial radiation. C) cloud cover. D) outgoing short-wave radiation.
Which of the following statements best describes what is "relative" in the theory of relativity?
A) The theory says that everything is relative. B) The theory says that truth can never be established in any absolute sense. C) The theory says that measurements of motion make sense only when we state what they are measured relative to. D) The theory says that the speed of light is relative and depends on who is measuring it. E) The theory says that all scientific results must be considered within the context of the scientists' individual viewpoints.
A 6.0-m wire with a mass of 50 g, is under tension. A transverse wave, for which the frequency is 810 Hz, the wavelength is 0.40 m, and the amplitude is 4.0 mm, is propagating on the wire
The time for a crest of this wave to travel the length of the wire is closest to A) 19 ms. B) 16 ms. C) 21 ms. D) 23 ms. E) 25 ms.