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Q. Speed of sound in air is unaffected by change in:
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Q. Endothermic reactions are those in which
Q. The part of the eye having the larges refractive index is:
Q. A radioactive substance does not undergo any change (in mass or charge) during
Q. The number of waves per second in a sound is called ________ of that sound.
Q. If the work done is zero, then the angle between force and displacement is
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