When you rub a balloon against your hair or clothing, electrons that were previously on the hair/clothing will "jump" onto the balloon. Therefore, the balloon now has a negative charge accumulated on its surface.
When you bring that balloon near another balloon with a neutral charge, they will stick to each other, because the electrons on the surface will be attracted to the positive charges on the other. The positive charges that were previously randomly oriented now line up at the surface. However, after some time, the electrons move around back to their former random positions.
The answer is (A) hope it helps
Answer:
it has more molecules than the burning match, which equals MORE total kinetic energy.
Explanation:
Answer:
Efficiency = 80%
Explanation:
Given the following data;
Work output = 240 N
Work Input = 300 N
To find the mechanical efficiency of a machine;
Substituting into the equation, we have;
Efficiency = 80%
Therefore, the mechanical efficiency of the machine is 80 percent.
