FIREMAN CRAWL ON THE FLOOR OF A ROOM THAT IS FILLED WITH SMOKE. WHY DO THEY DO THIS?

because smoke is light and floats at the roof so to aviod it firemen do it

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Because smoke is always be ho. And hot air is light weighted. So, smoke rises up and to breath oxygen properly fireman crawls.

 I hope it will help you !

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hot air is light and rises up 

not only firemen we too should do that when there is fire to avoid breathlessness .....
 
regards..
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nothing to be happen
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smoke rises upwards so , to be able to breath in oxygen they crawl on the floors
 
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so that he is able to breath properly





thumbs ups please !!
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They crawl to the floor away from smoke..and also the smoke is quite poisonous..and if it gets into their lungs..they may die of suffocations and respiratory problem..they indeed have a mask..and also they get to their goal point and doze the fire
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Firemen crawl on the floor of a room that is filled with smoke because smoke rises up higher to ceiling of room and it is better to see and breathe downwards .
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