Physics
A hunter on the ground wishes to shoot a bird on a tree at a distance with his rifle. He has to point the rifle

Vertically upwards
At the lower elevation than the bird
At a higher elevation than the bird
In the same direction as the bird

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Physics
A drop of liquid assumes spherical shape because:

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

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