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Which one of the following is used as an anti-freeze for the automobile engines ?
According to Stefan Boltzmann law, ideal radiators emit radiant energy at a rate proportional to
The nuclear radiators produced in a reactor which must be shielded are
The nuclear radiators produced in a reactor which must be shielded are:
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then