Physics
If an object is thrown upwards, what will be its velocity, when it reaches its maximum height?

14.7 m/s
20 m/s
4.9 m/s
0 m/s

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Physics
Why does the sea appear blue in colour?

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

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