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3 years ago

Help please!

Physics

2 answers:

Ne4ueva [31]3 years ago

8 0

Answer:

Spinning permanent magnets within an array of fixed permanent magnets

Explanation:

olchik [2.2K]3 years ago

5 0

Answer:

Definitely Spinning permanent magnets within an array of fixed permanent magnets

Explanation:

Any relative motion between magnets (be they permanent or electromagnetic) and a coil of wire will induce an electric current in the coil.

What will not induce an electric current is the relative motion between the two coils of wire (because there is no change in magnetic field), or the relative motion between two magnets (there are no coils of wire to induce the current into).

<em>Therefore, spinning permanent magnets within an array of fixed permanent magnets does not induce an electric current.</em>

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Answer:

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Explanation:

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Consider the whole system , gun and bullet. as an isolated system, so the net momentum is constant. In particular before firing the gun, the net momentum is zero. The conservation of momentum,

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so now the weight of the rifle= $\frac{25}{10}$

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