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You want to design a portable electric blanket that runs on a 1.5-V battery. If you use...

You want to design a portable electric blanket that runs on a 1.5-V battery.


If you use a 0.50mm diameter copper wire as the heating element, how long should the wire be if you want to generate 22 W of heating power? The resistivity of copper is 1.68×10^−8Ω⋅m

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