When 2 forces are applied in opposite directions, how do you calculate the net force?

a. you find the net force by dividing

b. you find the net force by subtracting

c. you find the net force by adding

d. you find the net force by multiplying

Which subatomic particle has a negative charge

Two conductors, a and b, are each in the shape of a tetrahedron. but of different sizes. they are charged in the following manner: 1. tetrahedron a is charged from an electrostatic generator to charge q. 2. tetrahedron a is briefly touched to tetrahedron b. 3. steps 1 and 2 are repeated until the charge on tetrahedron b reaches a maximum value. if the charge on tetrahedron b was q/4 after the first time it touched tetrahedron a. what is the final charge qbmax on tetrahedron b?

I’ve been stuck on this for a while