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Dovator [93]
3 years ago
5

Increasing which of the following would increase the magnetic force between the permanent magnet and the coil? A. Transformer B.

Circuit C. Current D. Generator
Physics
1 answer:
Gnoma [55]3 years ago
7 0

For this one, all you really need to do is eliminate any answers
that are absurd or meaningless.

You can't increase a transformer.
You can't increase a circuit.
You can't increase a generator.

When the <em><u>current</u></em> through a coil of wire increases, the magnetic field
around the coil increases, so there would be more magnetic force
between the coil and a permanent magnet.


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Answer:

Explanation:

Let fuel is released at the rate of dm / dt where m is mass of the fuel

thrust created on rocket

= d ( mv ) / dt

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this is equal to force created on the rocket

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so applying newton's law

v dm / dt = 220 dv / dt

v dm = 220 dv

dv / v = dm / 220

integrating on both sides

∫ dv / v    = ∫ dm / 220

lnv =  ( m₂ - m₁ ) / 220

ln4000 - ln 2500 = ( m₂ - m₁ ) / 220

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8 0
3 years ago
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Answer: A

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5 0
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