Physics
A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will

Increase
Remains the same
Decrease
First decrease and then increase

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Physics
Stationary wave is formed by

A transverse wave superposing a longitudinal wave
Two waves of the same speed superposing
Two waves of same frequency travelling in the opposite direction
Two waves of same frequency travelling in the same direction

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Physics
Which of the following is not a property of heavy water ?

Boiling point of heavy water is lower than that or ordinary water
Freezing point of heavy water is higher than that of ordinary water
It produces corrosion
Density of heavy water is higher than that of ordinary water

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