3 years ago

Most rocks are

Physics

1 answer:

liraira [26]3 years ago

4 0

Answer is A)mixtures of minerals

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The resistivity of gold is at room temperature. A gold wire that is 0.9 mm in diameter and 14 cm long carries a current of 940 m

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0.0360531138247 V/m

Explanation:

$\rho$ = Resistivity of gold = $2.44\times 10^{-8}\ \Omega .m$ (General value)

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$\rho=\dfrac{EA}{I}\\\Rightarrow E=\dfrac{\rho I}{A}\\\Rightarrow E=\dfrac{2.44\times 10^{-8}\times 940\times 10^{-3}}{\dfrac{\pi}{4}(0.9\times 10^{-3})^2}\\\Rightarrow E=0.0360531138247\ V/m$

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3 years ago

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What happens to the iron in the coilgun if the electricity in the coil was turned on

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What is the value of R2 in this parallel circuit? (5 stars)

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The total resistance of the circuit is 10 Ω.

Resistors in parallel have a total resistance of:

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2 years ago