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OLga [1]
3 years ago
12

Which of the following is an example of how pictures of a planet's surface can provide evidence about the planet's natural resou

rces?
A.
Pictures showing craters suggest the presence of gold.
B.
Pictures showing clouds suggest the presence of free oxygen.
C.
Pictures showing rocks suggest the presence of natural gas.
D.
Pictures showing valleys suggest the presence of water.
Physics
1 answer:
Volgvan3 years ago
5 0
I think it’s c but I’m not for sure
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Answer:

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Explanation:

We are given that

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We have to find the resultant magnitude of the magnetic field 29 cm above the wire and 29 cm below the wire.

According to Bio-Savart law, the magnetic field exerted by the wire at distance R is given by

B_{wire}=B_2=\frac{\mu_0I}{2\pi R}

We have R=29 cm=\frac{29}{100}=0.29 m

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Substitute the values in the given formula

B_2=\frac{4\pi\times 10^{-7}\times 40}{2\times \pi\times 0.29}=\frac{2\times 40\times 10^{-7}}{0.29}=2.76\times 10^{-5} T

The resultant magnetic field is given by

B=\sqrt{B^2_1+B^2_2}

Substitute the values then we get

B=\sqrt{(3.5\times 10^{-5})^2+(2.76\times 10^{-5})^2}

B=4.5\times 10^{-5} T

The resultant magnitude of magnetic field is same above and below the wire as it is at same distance.

The resultant magnitude of the magnetic field 29 cm below the wire=4.5\times 10^{-5} T

Hence, the resultant magnitude of the magnetic field 29 cm above  the wire=4.5\times 10^{-5} T

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