20. Name the process by which :
(a) water in a beaker gets heated by the burner kept below it.
(b) air above the candle flame gets heated.
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Explanation:
A)Answer: when the burner is placed below the beaker the heat of the burner is transport in the beaker and so the beaker is of glass the glass is a godd conductor of heat so because of heating glass the water in the beaker gets heated .
B)Conduction carries heat down the wick to melt more wax at the top of the candlestick. Convection draws hot wax vapors out from the wick and sucks oxygen from the surrounding air into the base of the flame.
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