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Q. In a laser (say neon laser) all the atoms emit the light waves of
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Q. The value of which one of the following quantity remains same in all system of units ?
Q. The point at which the solid, liquid and gaseous forms of a substance co-exist is called its
Q. Intensity of sound at a point is __________ its distance from the source.
Q. What element is used in bright flashing advertising signs?
Q. Rear view mirror of car is convex or concave?
Q. Which among the given does the Nucleus of an atom consist of -
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