As you are moving very quickly toward a speaker emitting a pure tone, which characteristics of the sound get larger? (There may be more than one correct choice.)
A) frequency
B) amplitude
C) wavelength
D) period
E) loudness
A, E
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A satellite of mass m has an orbital period T when it is in a circular orbit of radius R around the earth. If the satellite instead had mass 4m, its orbital period would be
A) 4T. B) 2T. C) T. D) T/2. E) T/4.
You shout at a cliff, and hear your echo in 2 seconds. If the speed of sound in the air is 340 m/s, the distance of the cliff from you is
a. 85 m. b. 170 m. c. 340 m. d. 680 m. e. none of the above.
A +3.0-µC point charge is initially extremely far from a positive point charge Q
You find that it takes 41 J of work to bring the +3.0-µC charge to the point x = 3.0 mm, y = 0.0 mm and the point charge Q to the point x = -3.0 mm, y = 0.00 mm. What is Q? (k = …) A) 27 pC B) 9.1 µC C) 4.6 µC D) 55 nC
Is it possible to have a zero electric field value between a negative and positive charge along the line joining the two charges?
A) Yes, if the two charges are equal in magnitude. B) Yes, regardless of the magnitude of the two charges. C) No, a zero electric field cannot exist between the two charges. D) cannot be determined without knowing the separation between the two charges E) cannot be determined without knowing the magnitude of the charges