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 balloon, we need to convert the charge in coulombs to the number of individual electrons.
1 electron has a charge of approximately 1.6 x 10^-19 coulombs.
To find the number of excess electrons, we can divide the charge in coulombs by the charge of a single electron:
Number of excess electrons = Charge (in coulombs) / Charge of a single electron
Given:
Charge on balloon = -3.1 μC = -3.1 x 10^-6 C
Charge of a single electron = 1.6 x 10^-19 C
Number of excess electrons = (-3.1 x 10^-6 C) / (1.6 x 10^-19 C)
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.
To determine the number of excess electrons on the negatively charged balloon, we need to know the charge of a single electron.
The elementary charge, denoted as 'e', is a fundamental physical constant that represents the charge of a single electron. The value of the elementary charge is approximately 1.6 x 10^-19 coulombs.
Given that the balloon has a charge of 3.1 μC, we can find the number of excess electrons using the following formula:
Number of excess electrons = Total charge on balloon / Charge of a single electron
Substituting the values into the formula:
Number of excess electrons = 3.1 μC / (1.6 x 10^-19 C)
To make calculations easier, let's convert 3.1 μC to coulombs:
3.1 μC = 3.1 x 10^-6 C
Now we can compute the number of excess electrons:
Number of excess electrons = (3.1 x 10^-6 C) / (1.6 x 10^-19 C)
Dividing these two numbers:
Number of excess electrons ≈ 1.94 x 10^13 electrons
Therefore, the negatively charged balloon has approximately 1.94 x 10^13 excess electrons.
Divide the balloon charge, -3.1*10^-6 C, by the electron charge, -e = -1.6*10^-19 C
You should get about 1.9*10^13 electrons. That's 19 trillion
Roughly the national debt of the United States!