Four students, a, b, c, and d, in a group take 6m long slinky and produce a longitudinal wave, and they observe that in 10 seconds 4 waves completed on this observation. What is the speed of the wave in a slinky?
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solution: there time = 10s
distance = 6m
total wave. = 4
time for one wave = 10/4
speed. =distance/time
so, speed = 6m/10se/4
= 6m×4/10se
= 2.4m/s
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