Answer:
If your form is correct (b)
Answer:
The heat causes the molecules on rubbing surfaces to move faster and have more energy.
If this is about simple machines the answer is: Inclined plane
The correct answer is A. the magnet to become stronger
The stronger the electric current in the piece of metal, the stronger the magnetic field will be.
I don't know what the exact word is, but I do know that the bigger an objects mass is the more it will attract other objects toward it, mainly smaller objects with less mass. it might be gravity or something around those lines....is it a multiple choice question?