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A)what type of wave contains compression and rarfactions

b)the waves which require medium to propagate is called as

c)in what type of wave is the vibration perpendicular to the direction of travel of the wave


1- Transverse wave
3- Mechanical wave 
3- Longitudinal wave

2 3 2
longitudinal waves travel parallel y
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1) Longitudinal   wave
2) Mechanical wave 
3) Transverse wave
i hope it helps..........
1 3 1
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