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Elanso [62]
3 years ago
5

If a magnet repels a metal object what can you say about the pole of the magnet and the pole of the object?

Physics
2 answers:
sleet_krkn [62]3 years ago
7 0
Poles are the same D is the right answer
Ilya [14]3 years ago
3 0

Answer:

The correct answer is option D. The poles are the same.

Explanation:

Hello!

Let's solve this!

For an object to be attracted to a magnet, the charges must be opposite. But when, otherwise, they repel, it means that the charges (the poles) are the same.

In this case we conclude that the correct answer is option D. The poles are the same.

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Let the mass of the person be m. Total momentum is conserved (because the exterior forces on the system are balanced), especially the component in the vertical direction.

Given that,

Mass of gallon is M

Let man mass be m

Velocity of man is v

Let velocity if ballot be Vb

When the person begin to move we have

Conservation of momentum

mv + MVb=0

MVb=-mv

Vb= -(m/M) v

Given that the mass of man is less than mass of balloon. i.e. m<M

So, if m<M, then, m/M <1

Therefore, .

Vb= -(m/M) v

Vb< -v

This implies that the velocity of balloon is less than the velocity of man and if is also moving in opposite direction

So the man is moving upward, then the balloon is moving downward and it's velocity is less than the velocity of man,

The answer is C

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6 0
3 years ago
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yanalaym [24]

Answer:

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t = d / v

t = 75 / 50

t = 1.5 hour

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8 0
2 years ago
How does Earth's surface and the structures on the surface change as a result of an earthquake? Help me pls and I will give Brai
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<span>Earthquakes often cause dramatic changes at Earth's surface. In addition to the ground movements, other surface effects include changes in the flow of groundwater, landslides, and mudflows. Earthquakes can do significant damage to buildings, bridges, pipelines, railways, embankments, dams, and other <span>structures</span></span>
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ivolga24 [154]

The reaction 4Al + 3O₂ → 2Al₂O₃ is a synthesis or also called combination reaction because reactants combine to produce a new compound (Option 2).

<h3>What is a synthesis combination reaction?</h3>

In chemistry, a synthesis or combination reaction is any type of chemical reaction in which two or more molecules called reactants combine to produce one or more molecules called products of such reaction.

Therefore, with this data, we can see that a synthesis or combination reaction is a chemical process where two or more molecules combine to produce a new molecule known as a product.

Learn more about synthesis combination reactions here:

brainly.com/question/14703806

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Natalka [10]

Answer:

d

Explanation:

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