Waves - Set 4 | NUST Entrance Test Physics

Which one of the following wave motions is longitudinal:

Difficulty: Easy

A:

One end of a string is fixed and the other is wiggled

B:

A piece of stone is thrown into still water

C:

Pulling of weight hanging vertically with a spinal spring

D:

Both a and c

Sound waves cannot propagate through:

Difficulty: Easy

A:

Walls

B:

Grass

C:

Wood

D:

Vacuum

Experimental value of speed of sound in air at $0^{\circ}$C is:

Difficulty: Easy

A:

280 m/sec

B:

320 m/sec

C:

332 m/sec

D:

340 m/sec

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