What method of energy transfer requires no medium for transfer?

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Clocks, which moves with the velocities comparable with the velocity of light, run ?

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Hygrometer is used for measuring the ____________?

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Water is heated in a kettlE. The inside water is heated by convection. A person sitting near the fire receives heat by ________?

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__________ gas is released when coal is burnes in ln lack of Oxygen?

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Which of the following noble gases is abundant in air?

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