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17. Multiple choice question XVII

1. A stretched slinky is given a sharp push along its length. A wave travels from one end to another. The wave so produced is:

transverse wave
longitudinal wave
stationary wave
none of the above

2. A longitudinal sound wave in air consists:

a number of rarefaction pulses one after the other
a number of compression pulses one after the other
compression and rarefaction pulses alternating with each other
a rarefaction pulse followed by compression pulse, separated by some distance

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