What is a lie detector?

Answer A lie detector is scientifically known as a polygraph. It is a machine that measures people's physical responses to questions, to determine if they are telling the truth.MeasurementsA person is con... Read More »

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How to Install a Smoke Detector or Carbon Monoxide Detector?

It's an overused saying - better safe than sorry. Most fire deaths occur in homes lacking smoke detectors.[1] To protect your loved ones, it is imperative that you install smoke and carbon monoxide... Read More »

What is a radar detector?

A radar detector is a device that identifies the radar signals police use to measure the speed of cars. When it detects such signals, it beeps or issues some other alarm, so that a speeding driver ... Read More »

What is a motion detector?

A motion detector is a device that can detect movement within its field. The movement can trigger a door opening, like when grocery store doors open, or sound an alarm or signal lights to come on w... Read More »

What is a gas detector used for?

Natural gas detectors are used to indicate the presence of the possibility of a natural gas leak in or near your home. Though there is a "rotten egg" smell usually associated with a natural gas lea... Read More »