A negatively charged balloon has 3.1 μC of
charge.
How many excess electrons are on this bal-
loon?
Answer in units of electrons.
To determine the number of excess electrons on the negatively charged balloon, we need to convert the given charge of the balloon into units of electrons.
The elementary charge, represented by "e", is the charge of a single electron. It is approximately equal to -1.6 x 10^-19 coulombs (C).
To find the number of excess electrons, we divide the total charge of the balloon by the charge of a single electron:
Number of excess electrons = Total charge on balloon / Charge of a single electron
Given that the total charge on the balloon is 3.1 μC, we need to convert it into coulombs before performing the calculation. 1 μC (microcoulomb) is equal to 10^-6 C:
Total charge on balloon = 3.1 μC = 3.1 x 10^-6 C
Now we can calculate the number of excess electrons:
Number of excess electrons = (3.1 x 10^-6 C) / (-1.6 x 10^-19 C)
Dividing these two values will give us the answer:
Number of excess electrons ≈ 1.94 x 10^13 electrons
Therefore, there are approximately 1.94 x 10^13 excess electrons on the negatively charged balloon.