Question
How far must the point charges = 7.20 and = -25.0 be separated for the electric potential energy of the system to be -130 ?
Answers
Cassie
130 is in Joules
7.20 and 25.0 are in MicroCoulomb and the answer has to be in cm
7.20 and 25.0 are in MicroCoulomb and the answer has to be in cm
drwls
Require that
k Q1*Q2/R = -130 J
k is the Coulomb constant,
8.99*10^9 N/C^2*m^2
Q1 = 7.2*10^-6 C
Q2 = 25.0*10^-6 C
Solve for R, which
R will be in meters.
Convert it to cm
k Q1*Q2/R = -130 J
k is the Coulomb constant,
8.99*10^9 N/C^2*m^2
Q1 = 7.2*10^-6 C
Q2 = 25.0*10^-6 C
Solve for R, which
R will be in meters.
Convert it to cm