Physics
What is the direction of torque?

Same as the direction of applied force
Parallel to the radius
Opposite to the direction of applied force
Perpendicular to the direction of applied force

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Physics
The blue colour of sky is due to

Reflection of sunlight
Scattering of shorter wavelengths of sunlight in the atmosphere
Refraction of sunlight
Scattering of longer wavelengths of sunlight in the atmosphere

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