The image shows an infrared picture of a disc brake on a car after it has been driven and stopped. heat is created when the brake pad comes in contact (rubbing) with the brake disc.
what causes the disc brake to heat up to almost 200°f ?
a)
bad tires
b)
friction
c)
solar energy
d)
electromagnetic energy

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d