Wednesday, August 15, 2012

physics


What is the period of a wave, if 20 crests pass an observer in 4 seconds?

A. 80 s
*B. .2 s 
C. 5 s
D. 4 s

Two waves traveling in the same medium interfere to produce a standing wave. What is the phase difference between the 2 waves at a node? 

A. 0 degrees
B. 90 degrees
*C. 180 degrees 
D. 360 degrees

As a pulse travels along a rope, the pulse loses energy and its amplitude 

*A. Decreases 
B. Increases
C. Remains the same

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