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Mariulka [41]
3 years ago
13

• Usain Bolt can run at 10 m/s. If he runs for about 20 seconds, how far around the race track did he go?

Physics
1 answer:
yanalaym [24]3 years ago
4 0

Answer:

200metters

Explanation:

because in one second hes going 10 metter in 20 second he will go 20×10=200

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It informs you with the info you need then again you are most likely getting socialy forced information.

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Two service technicians are discussing the best way to thread a rod. Technician A says they should use a tap and die set. Techni
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A toroidal coil of N turns has a central radius b and a square cross section of side a. Find its self-inductance.
Xelga [282]

Answer:

L = \frac{\mu_0 N^2 (a^2)}{2\pi b}

Explanation:

As we know that magnetic field due to torroid is given as

B = \frac{\mu_0 N i}{2\pi b}

this is approximately constant magnetic field along the axis of the torroid

now the flux linked with one coil of the torroid is given as

\phi = B.A

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now total flux of N number of coils is given as

\phi_{total} = \frac{\mu_0 N^2 i(a^2)}{2\pi b}

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So we know that

L = \frac{\phi}{i}

L = \frac{\mu_0 N^2 (a^2)}{2\pi b}

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