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The Answer is rarefaction.
they were a day apart
They are 2 hours apart.
1000000 mm appart ext.
it depends on the person
Most smoke detectors are worth far less then your deductible. But electronic failure is usually not a covered peril in a homeowners policy.
Cheap and effective when maintained properly. Smoke detectors will run out of battery over time as they are not wired in to the houses electrical system. Statistics show that far fewer people die in house fires when smoke alarms are present. When the smoke alarms are placed to close to bathrooms steam may interfere with the detector, triggering false alarms. Ionization detectors seem to respond better with high flames which could be a problem under certain circumstances.
i beleve they are 4 feet apart
As far as we know, Americium is a wholly man-made element. It was first produced in 1944 and was the fourth trans-Uranic element to be discovered. So, apart from the debris from bomb explosions, and remnant rubbish from smoke detectors, its presence in the Earth's crust is zero.
There are basically two types of smoke detector; one type measures the opacity of the air to literally "see" if there is smoke. The other type tests for ionization that occurs when there is a fire. That type smoke detector uses a small radioactive chip to determine if freshly ionized smoke is present. It's a far more accurate means of determining the presence of fire and associated hazardous smoke. Many smoke detectors use a combination of both detectors. A separate type of detector is the carbon monoxide detector, which senses the presence of harmful carbon monoxide in the air. Most will even indicate the percentage of carbon monoxide. Note that carbon monoxide is typically present when a furnace or other heating device malfunctions.
The Answer is rarefaction.
6" is preferred
It is used in smoke detectors as it cannot travel far in air. Alpha radiation is emitted and as long as the detector in the device is receiving the alpha radiation, then no smoke is present. When smoke particles are present, they interrupt the radiation, and so the detector doesn't pick up the radiation, causing the alarm to go off.
half the wavelength of the lowest frequency
As far as I recall, no. My husband works in electronics and never has him or I seen a camera detecting GPS. There are radar detectors out there but those are separate.
Far apart.
"If your loved one is with God and God is with you, how far apart can you be?" - Peter Marshall