When a force acts on an object from an angle other than either 0° or 180° to the direction of motion:
a. the force is not in the direction of motion, so no work gets done.
b. the force is perpendicular to the direction of motion, so no work gets done.
c. the parallel and perpendicular component of the force both do work.
d. the parallel vector component of the force does work but the perpendicular one does not.
e. the perpendicular vector component of the force does work but the parallel one does not.
d
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When the adjustable mirror on the Michelson interferometer is moved 20 wavelengths, how many fringe pattern shifts would be counted?
a. 5 b. 10 c. 20 d. 40 e. 80
A parallel plate capacitor is connected to a battery and charged to voltage V. Leah says that the charge on the plates will decrease if the distance between the plates is increased while they are still connected to the battery. Gertie says that the charge will remain the same. Which one, if either, is correct, and why?
a. Gertie, because the maximum voltage is determined by the battery. b. Gertie, because the capacitance of the capacitor does not change. c. Leah, because the capacitance decreases when the plate separation is increased. d. Leah, because the capacitance increases when the plate separation is increased. e. Neither, because the charge increases when the plate separation is increased.
A carousel that is 5.00 m in radius has a pair of 600-Hz sirens mounted on posts at opposite ends of a diameter. The carousel rotates with an angular velocity of 0.800 rad/s. A stationary listener is located at a distance from the carousel
The speed of sound is 350 m/s. The maximum beat frequency of the sirens at the position of the listener is closest to A) 6 Hz. B) 8 Hz. C) 10 Hz. D) 12 Hz. E) 14 Hz.
Although all known stars appear to rise from the eastern horizon, astronomers might someday discover a star that will rise from the western horizon.
Answer the following statement true (T) or false (F)