Q. What is the scale used for measuring the intensity of the earthquake?
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Q. Speed of sound in air is unaffected by change in
Q. The rate at which energy is transferred is called
Q. When a body falls from an aeroplane, there is increase in its
Q. A doppler effect occurs when a source of sound moves
Q. The angle between the ________ and the incident ray is called the angle of incidence.
Q. Which of the following laws is associated with the heating effect of electric current ?
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