Question

1. Two magnets are placed on a table, and they immediately move to attach to each other. Which statement is correct about the energies in the system?
Kinetic energy is at its peak when the magnets are first released, then it decreases steadily. Energy stored in the magnetic field becomes zero.

The kinetic energy of the system is derived from the thermal energy created by increased velocity. Energy stored in the magnetic field does not change.

Kinetic energy and velocity are at zero when the magnets are held apart, and both increase rapidly when they are released and move together. Energy stored in the magnetic field decreases.

The velocity and kinetic energy of the system increase as the energy stored in the magnetic field increases.


2. Two magnets are placed on a table, and they immediately move to attach to each other. Which statement is correct about the energies in the system?

The energy stored in the system is converted to kinetic and thermal energy.

The energy stored in the system is converted to kinetic energy.

The energy stored in the system is converted to kinetic, thermal, and sound energy.

The energy stored in the system is converted to thermal and sound energy.


3. A magnet is moved close to a rubber band. How does the energy stored in the magnetic field change?

The energy stored in the magnetic field increases.

The energy stored in the magnetic first increases and then decreases.

The energy stored in the magnetic field does not change.

The energy stored in the magnetic field decreases.


4. Two donut-shaped magnets are stacked on top of each other with a wooden dowel in the center. The south poles of the magnets are facing each other. Once the upper magnet is released, it accelerates downward and stops 1 cm above the lower magnet. How does the energy stored in the magnetic field change?

All of the energy stored is converted into kinetic, thermal, and gravitational energy.

Some of the energy stored is converted into kinetic, thermal, and gravitational energy.

All of the energy stored is converted into kinetic and thermal energy.

Some of the energy stored is converted into kinetic and thermal energy.

Answer 1

Answer: 1: kinetic energy and velocity are at zero when the magnets are held apart, and both increases rapidly when they are released and move together. Energy stored in the magnetic field decreases.

2: The energy stored in the system is converted to kinetic, thermal, and sound energy.

3: The energy stored in the magnetic field does not change.

4: Some of the energy stored is converted into kinetic and thermal energy.

5: Two small repelling magnets hold each other in place.

Just took the quiz all are correct! I hope this helps you! :)