The wavelength of a wave describes ________.
A. the distance a wave will travel after being emitted
B. the distance from one end of a laser beam to the other
C. the distance between a peak and the nearest trough
D. the distance a wave can travel before being absorbed
E. the distance between two successive peaks in a wave
Answer: E
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the magnetic field in the primed frame.
A. A B. B C. C D. D E. Toward the viewer F. Away from the viewer T. There is no field of this type.
While a ship moves toward the right at constant velocity, a seaman atop the mast drops a stone which freely falls to position
1) A. 2) B. 3) C. This is better understood by realizing that 4) the ship moved to the right a distance equal to that between A and B while the stone fell vertically. 5) the stone was moving to the right just as fast as the ship during the fall. 6) the net force acting on the stone is equal to its weight. 7) because of inertia, the stone experiences a horizontal motion unlike that of the ship. 8) the stone underwent an acceleration while the ship did not.
Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 2sin(4x)cos(3t), where x is in m and t is in s. What is the speed (in m/s) of the interfering waves?
A. 0.75 B. 0.25 C. 1.3 D. 12 E. 3.0
A piece of iron sinks to the bottom of a lake where the pressure is 21 times what it is at the surface of the lake. Which statement best describes what happens to the volume of that piece of iron?
A) Its volume increases slightly. B) Its volume decreases slightly. C) There has been no change in the volume of the iron. D) Its volume becomes 1/21 what it was at the surface. E) Its volume becomes 21 times greater than at the surface.