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Q. The frequency of ultrasound wave is typically
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Q. In which mode of transmission, the heat waves travel along straight line with the speed of light?
Q. Water cannot be used to extinguish fire caused by electric current, because
Q. The force of friction between two surfaces will increase if:
Q. A simple microscope consists of
Q. A gap is left between two rails of a railway track to accommodate...... of the metal.
Q. Which scientist discovered the radioactive element radium?
Q. A fountain pen works on the principle of
Q. Which among the given is used as a moderator in nuclear reactors
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