Solve the all parts of given question:
Question: A charge Q1 = 1.10 x 10-9 C is a distance r = 4.00 cm away from a charge Q2 = -8.25 x 10-9 C.
Part A: Calculate the magnitude of the force on Q1 due to Q2.
Part B: Calculate the potential at a location 2.56 cm from Q1 and 1.59 cm from Q2.
Having trouble with this physics question, can you please explain with the answer.