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Q. When a steel ball is placed on the surface of mercury, it does not sink because
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Q. The wave theory of light can explain
Q. The work done by the string of a simple pendulum during one complete oscillation is equal to
Q. When an electric bulb breaks, there is an explosive sound. That is due to
Q. The word ''insolation' means
Q. Which alternative energy source is exhaustible?
Q. Name the terminals of a BJT.
Q. How many laws of physics are there?
Q. What will happen if an object is dropped from a height and there is no air resistance?
Q. The device used to change the speed of an electric fan is
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