Answer:
Magnetism at atomic /sub - atomic levels is mostly due to charged particles called electrons. Electrons have spin which give them angular momentum and thus a magnetic moment associated with it. That is the cause of Magnetism at atomic levels. Electrons fill up orbitals in atoms in pairs.
A change in momentum is called impulse.
The answswer would be d because there is a battery, and a metal clip to conduct electricity.
hope this helps! C:
Answer:
<h2>250 kg</h2>
Explanation:
The mass of the rock can be found by using the formula

p is the momentum
v is the velocity
From the question we have

We have the final answer as
<h3>250 kg</h3>
Hope this helps you