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fredd [130]
3 years ago
9

A student creates an electromagnetic wave and then reverses the direction of the current. Which of the following will happen to

the magnetic field?
Physics
1 answer:
mash [69]3 years ago
7 0

Answer:

I believe the electromagnetic field should be reversed.

Explanation:

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Answer:

If the system consists of the block only, the work done by the gravity is negative.

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Explanation:

If the system consists of the block only, then the system experiences two external forces: one exerted by the hand that lifts the block vertically upward and other exerted by the earth (gravity), which is opposed to the movement of the system, so the work done by gravity is negative.

On the other hand, if the system consists of the block and the earth, then only exists a external force which is the exerted by the hand. So, the force exerted by gravity is zero.

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Answer: I think the answer is D

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7.07 hours

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