27. a) Which part of a flame does a goldsmith blow for melting gold and silver?
b) How water gets boiled in paper cup without burning it?
e) 60kg of fuel was completely burnt for an experiment. The amount of heat energy was found
to be 180000 KJ. Calculate the calorific value of the fuel
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a. Blue or outermost
b. It makes the paper wet
c. 3000Kj/kg
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