Give two examples each of longitudinal waves and transverse waves.
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Longitudinal waves:
The waves which travel along a spring when it is pushed and pulled at one end.
Sound waves in air.
Transverse waves:
The waves produced by moving one end of a long spring up and down rapidly, while other end is fixed.
The water waves or ripples formed on the surface of water in a pond.
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In an experiment, Anhad studies sound waves. He sets up a loudspeaker to produce sound as shown below:
Anhad adjusts the signal to the loudspeaker to give a sound of frequency 200Hz.
What happens to the air in-between Anhas and the loudspeaker?
The drawing shoes a ship $800\ m$ from a cliff. A gun is fired on the ship. After $5$ seconds the people at the front of the ship hear the sound of the gun again.
A sound producing body is at considerable distance from a man. There can be four different media $W, X, Y$ and $Z$ between the sound producing body and the man. The medium $X$ brings the sound to man most quickly whereas medium $Z$ takes the maximum time. The time taken by medium $W$ in bringing sound to man is less than that of $X$ but more than that of $Z.$ The medium $Y,$ however, fails to bring the sound from the sound producing body to the man. Which medium could be the one:
Having no fixed shape and no fixed volume$?$
Having a fixed volume but no fixed shape$?$
Having the same composition as that on the moon$?$