HW

Late post, so do these if you have time:

1.  What are each of the quantities in the Coulomb's law equation, and what are their units?

2.  a.  Calculate the force that exists between two clusters of charge (each 10 micro coulombs), 0.1-m apart.  The prefix "micro" means x 10^-6.  Be sure to use scientific notation (EE key --> 2nd comma) on your calculator).
b.  Is this force attractive or repulsive?  How do you know?

3.  If you have a cluster of charge that is 5 C in magnitude, how many protons is this?  Recall that 1 C of charge is 6.25 x 10^18 protons.

4.  Thinking about the inverse square law - if the distance between two charges is changed to five times the original distance, what exactly happens to the force between them (compared to the original force)?

5.  If the distance between two charges is changed to half the original distance, what exactly happens to the force between them (compared to the original force)?

*6.  The radius of a typical Hydrogen atom is 53 pm (5.3 x 10^-11 m) -- the distance between a proton and electron in "orbit" around it.  What is the force between these two particles?  Recall that the charge of a proton and electron is the same, though one is negative and the other is positive.