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bekas [8.4K]
3 years ago
11

The fundamental rule for the attraction and repulsion of magnets is magnetic forces follow the inverse-square law. opposite char

ges attract each other and like charges repel. like poles repel each other; opposite poles attract. magnetic poles attract other magnetic poles.
Physics
1 answer:
Hitman42 [59]3 years ago
7 0

Answer:

Explanation:

It is true: the fundamental rule for the attraction and repulsion of magnets is magnetic forces follow the inverse-square law.

The force is given by

F\alpha \frac{1}{r^{2}}

It is true: opposite charges attract each other and like charges repel.

It is true: like poles repel each other; opposite poles attract.

It is not true:  magnetic poles attract other magnetic poles.

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3 years ago
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Answer:

B) Within an atom, an electron can have only particular energies.

Explanation:

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2 years ago
A high school physics student is sitting in a seat read-
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The equilibrium condition allows finding the result for the force that the chair exerts on the student is:

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Newton's second law gives the relationship between force, mass and acceleration of bodies, in the special case that the acceleration is is zero equilibrium condition.

            ∑ F = 0

Where F is the external force.

The free body diagram is a diagram of the forces on bodies without the details of the shape of the body, in the attached we can see a diagram of the forces.

Let's analyze the force on the chair.

            N_{chair} - W_{chair} - W_{student} = 0 \\ \\N_{chair} = W_{chair} + W_{student}

Let's analyze the forces on the student.

          N_{student} - W_{student} = 0  \\N_{student} = W _{student}

           

In conclusion using the equilibrium condition we can find the result for the force that the chair exerts on the student is:

  • The reaction force that the chair exerts on the student's support is equal to the student's weight.

Learn more here: brainly.com/question/18117041

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