Friction is the force you get when you (for example) Rub something with another, it's a force that may generate heat and even some resistance. Another example is rubbing your hands together, they get hot, therefore friction is working, without friction you wouldn't be able to stop moving.
Answer:
The north pole has the strongest magnetic force
Answer:
D. all regions of the spectrum
Explanation:
I did some research ; )
Electrical current is measured using the ampere.
