Physics
When all the forces and torques are balanced in a mechanical body it is said to be in

Static
None of these
Equilibrium
Buoyancy

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Physics
Why does the sea appear blue in colour?

Interference of the sun light from water surface
Reflection of the sun light from water surface
Scattering of the sunlight by water molecules
Refraction of the sun light

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Physics
A drop of liquid assumes spherical shape because:

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

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