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Why was the smoke alarm invented?
To make people aware of a fire occurring or starting.
What year were smoke detectors invented?
Smoke detectors were invented in the year 1967. :P
How many times do you have to change the batteries of a smoke alarm?
If the smoke alarm lasts for ten years before you need to replace it, and the batteries should be replaced at least once per year, you would need to change the batteries of a smoke alarm ten times before you replace the entire thing.
How did Chinese people communicate before telephone was invented?
They used smoke signals to communicate with one another.
Where would you not install a smoke alarm?
I would not install a smoke alarm, in the kitchen.
What was used before smoke signals were invented?
fire
How did smoke alarm change the world?
Prevented most people from dying in their sleep.
Will incense set off a smoke alarm?
Any type of smoke, steam or particles denser than air will set off a smoke alarm. This means that smoke emitted from the incense will set off a smoke alarm when in range of the detector.
What warns people of a fire in their house?
The smoke/fire alarm will go off or you will see smoke. You could also see the fire.
What is something that alerts you?
alarm clock smoke alarm cellphone ................................................
When was the smoke signal invented?
The smoke signal was invented in 1785 as it was a good way of communicating without other people knowing what you are doing.
When is a smoke alarm used?
so that when there is a fire in their house or something and people are unaware of it....the smoke will start the alarm and then the person will do something about it...it basically lets them know that there is a fire.
