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

First decrease and then increase
Increase
Remains the same
Decrease

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Physics
A drop of liquid assumes spherical shape because:

Intermolecular forces are strong in liquids
A sphere has the largest surface area for a given volume
Inter molecular forces are weak in liquids
A sphere has the least surface area for a given volume

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