Question
Number 13
What keeps an inflated balloon from falling down if you rub it against your hair and place it against a wall? When you rub the balloon against your hair, two balloon may have some oil attached to it, which can be sticky. Rubbing polarizes the air inside of the balloon. When you rub the balloon against your hair, it will remove some mass from the balloon and make it lighter. Rubbing leaves a balloon electrically charged: the charged balloon polarizes the wall. Rubbing distorts the atoms inside the balloon and polarizes it. A strong lightning bolt transfers about 25 C to Earth. How many electrons are transferred? The elementary charge is 1.60218 times 10^-19 C.
Explanation / Answer
Total charge transferred = 25 C
charge on 1 electron = 1.60218*10-19 C
Total number of electrons = 25/(1.60218*10-19) = 15.6*1019
