why is air is blown around the coal or wood to burn it?
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as fire needs oxygen to burn anything
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When coal or wood burns, CO2 is produced. In order to burn coal or wood, we need a continuous supply of oxygen and removal of the CO2. By blowing air, the necessary oxygen reaches the burning wood and CO2 is expelled which keeps the wood burning.
sonu2423:
a simple pendulum takes 42 seconds to complete 24 oscillations. find out the time period of the pendulum.
please give answer
of the this question
the time period is 1.75 sec
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