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YouTubeMS Paintsplained
How does a fire alarm know which room?
How does a fire alarm know which exact room is on fire? The panel constantly calls out to every detector by number. The one breathing smoke shouts its number back — and the panel looks that number up in a stored list. Here's the strange part: the detector has no idea what room it's in. #Shorts #howitworks #firealarm #everydayscience #explained
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