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The plastic is a form of insulation. Insulation used to be made from non-plastic materials like cloth. It protects the wire from the outside world. Without insulation the electricity would cause shocks, fires, and short circuits.
Electricity does not cause harm in the workplace. With all of the proper safety rules being followed and safety equipment being worn and safety guards in place, there is no greater risk than anything else within the workplace.
A trembler switch operates by vibrations. Vibrations cause the switch mechanism to complete or interrupt an electrical circuit. It can be used to trigger and alarm, turn on lights or many other devices. A simple trembler uses a metal can (soup can) with a small hole in the top and a weight suspended from a bare wire through the hole with a weight attached to the end of the wire (the hole must be large enough so the wire does not make contact with the can). The other end of the wire is connected to a battery (or other power source). The other pole of the battery is connected to the can. When vibrations cause the weight to move enough to cause the bare wire going through the hole in the top of the can to contact the can the circuit is completed.
Pure water, by itself, is not capable of conducting electricity. However, when other substances are added and ions make their way into water, those free ions can cause water to conduct electricity.
Anything, including a person or a machine, that can turn a generator will cause the generator to make electricity. Most commonly generators are turned by water turbines, wind turbines, gasoline or petrol engines, diesel engines or steam engines.
Devices like floats or tubes are put in the water and waves come the tubes vibrate and the vibrations are sent to an on-land station where the vibrations are changed into electricity
Vibrations
Vibrations cause sound waves
gas.
Gas
Tornadoes can cause some minor ground vibrations that have been picked up by seismometers, but these vibrations are too small to cause damage or even be felt.
Vibrations,
they dont want to see you go
Seismic waves cause vibrations which leads to earthquakes
Resonance is the answer.
the surface waves cause vibrations invisible to the eye. these vibrations shake rocks and stuff on the surface and result in fractional movement.
some sort of std such as siphilous in your stomach lining