Answer:

1. resistance is an act or instance of opposing.

• the ability to withstand the force or effect of resistance to disease.
• an opposing or slowing force The car's sleek design reduces wind resistance.
• the opposition offered by a substance to the passage through it of an electric current.

5. Friction produces heat because it causes the molecules on rubbing surfaces to move faster and have more energy.Rougher surfaces have more friction between them. Heavier objects also have more friction because they press together with greater force.

For instance, when two objects rub together, friction causes some of the energy of motion to be converted into heat, according to the American Chemical Society. This is why rubbing two sticks together will eventually produce a fire.

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PA BRAINLIEST