Which of the following is a Non-Luminous body?
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Echocardiogram is more closely related to
An incident ray strikes a plane mirror at an angle of 20 deg with the mirror. The angle between the incident ray and reflected ray is ____.
A ball of 0.1 kg is dropped from rest. When it falls through a distance of 2 m, the work done by the force of gravity is
What is the value of acceleration due to gravity on the surface of the earth?
The energy stored in a dry cell is in the form of
Which of the following changes when a body performs uniform circular motion?
The quantum theory of light was given by
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