The tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called
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A spoon which looks bent is an example of which of the following?
An earthquake of magnitude _________________ on Richter scale has thousand times more destructive energy than an earthquake of magnitude 4.
Which of the following is NOT based on principle of relationship between volume and pressure of air?
The quantum theory of light was given by
An object of 1.2 cm height is placed 30 cm before a concave mirror of focal length of 20 cm toget a real image at a distance of 60 cm from the mirror. What is the height of the image formed?
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 ____.
The work done in one complete revolution of the moon around the earth is equal to