Three charged balls of fluff are nailed down to the table at coordinates (0.30 m, 0), (0, 0.10 m), and (0, 0). They have charges 6.0, -1.0, and 5.0 nanocoulombs. How large
is the force on the charge at the origin due to the other charges? (b) What direction is it
in? (c) If you vacuumed up the charge at the origin to get rid of it, is there still an electric
field there? What is its magnitude and direction?

i. like it i'm gonna edit it tomorrow

unlike poles attract

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

conservation of mass

mass before something happens = mass afterwards