World Geography
The unit of the light year is used for measuring

distance between bodies in the universe
speed of ships
speed of satellites
speed of rockets

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World Geography
Which among the following statements is not correct about Plunge pool?

They occur at the mature stage of the river development
They are often very deep, generally related to the height of fall and the volume of water,
It is created by the erosional forces of cascading water
It is a deep depression in a stream bed at the base of a waterfall

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