Standing waves can result from _____ waves
a. longitudinal b. transverse
c. both longitudinal and transverse d. neither longitudinal nor transverse
c
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An object moves in a direction parallel to its length with a velocity that approaches the velocity of light. The length of this object as measured by a stationary observer
A) approaches infinity. B) approaches zero. C) increases slightly. D) does not change.
Just after a big fish swallows a small fish, the momentum of the two-fish system is
A) greater after lunch than before. B) the same before and after lunch. C) somewhat less after lunch.
A 4.0-kg block is pushed up a 36° incline by a force of magnitude P applied parallel to the incline. When P is 31 N, it is observed that the block moves up the incline with a constant speed. What value of P would be required to lower the block down the incline at a constant speed?
a. 27 N b. 15 N c. 13 N d. 17 N e. 19 N
If a diffraction grating is heated (without damaging it) and therefore expands, what happens to the angular location of the first-order maximum?
A) It moves toward the centerline. B) It moves away from the centerline. C) It doesn't change.