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physics

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122 questions


A girl of mass 48kg runs up 2.5 steps each of height 0.2m to...
A girl of mass 48kg runs up 2.5 steps each of height 0.2m to reach the first floor of a storey building the power expanded by girl is 400W calculate the time...
3 days ago 1 answer(s) 0 votes


An astronomical telescope is said to be in normal adjustment...
An astronomical telescope is said to be in normal adjustment when the A. eye is accommodated B. focal length of objective lens is longer than t...
8 months ago 1 answer(s) 2 votes


The velocities of light in air and glass are 3.0 x 108ms-1 a...
The velocities of light in air and glass are 3.0 x 108ms-1 and 2.0 x 108ms-1 respectively. If the angle of refraction is 30°, the sine of the angle of in...
8 months ago 1 answer(s) 3 votes