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vivado [14]
3 years ago
11

Most rocks are

Physics
1 answer:
liraira [26]3 years ago
4 0
Answer is A)mixtures of minerals
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The relationship between frequency wavelength and speed holds for light waves because
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Explanation:

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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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Answer:

0.0360531138247 V/m

Explanation:

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

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A = Area = \dfrac{\pi}{4}d^2

E = Electric field

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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

The  electric field in the wire is 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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Answer:

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The total resistance of the circuit is 10 Ω.

Resistors in parallel have a total resistance of:

1/R = 1/R₁ + 1/R₂

1 / (10 Ω) = 1 / (20 Ω) + 1/R₂

R₂ = 20 Ω

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2 years ago
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