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Not normally, but it could be, say in an alarm system.

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12y ago

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Why does metal complete a circuit when you plug it into an outlet?

Metal is a good conductor of electricity hence it gives an easy path and completes the circuit.


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The top horizontal element of a window frame is the head. The bottom horizontal element of the window frame is the sill.


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Metal transmits heat and cold better than vinyl does, so a metal window frame would heat up quicker and hotter than a vinyl window frame. That temperature change might also affect the insulating properties of the window.


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