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Q. The speed of sound in air depends on
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Q. Which property of a material opposes the passage of magnetic flux through it ?
Q. Constellations appear to change their positions at different times of night because
Q. When a steel ball is placed on the surface of mercury, it does not sink because
Q. An iron hammer lying in the sun appears much hotter than its wooden handle because
Q. The point where total mass of a body is supposed to be concentratedis known as
Q. An artificial satellite stays in the orbit around the Earth because
Q. Which determines the frequency of a sound wave?
Q. Clear night is cooler than cloudy night because
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