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Q. Decibel is a term connected with :
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Q. Conversion of heat into electrical energy is achieved by using :
Q. On a rainy day, small oil films on water show brilliant colours. This is due to
Q. Endothermic reactions are those in which
Q. Doppler effect is independent of
Q. The frequency of a sound wave is related to its
Q. Out of the following which is not emitted by a radioactive substance?
Q. Tensional forces normally cause which one of the following?
Q. Central core of atom is called
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