Two parallel conducting plates are separated by 9.2 cm, and one of them is taken to be at a potential of zero volts. what is the electric field strength between them in v/m, if the potential 8.8 cm from the zero volt plate is 475 v? what is the voltage between the plates in v?

Aspring with an unstrained length of 0.071 m and a spring constant of 2.6 n/m hangs vertically downward from the ceiling. a uniform electric field directed vertically upward fills the region containing the spring. a sphere with a mass of 5.29 10-3 kg and a net charge of +7.2 µc is attached to the lower end of the spring. the spring is released slowly, until it reaches equilibrium. the equilibrium length of the spring is 0.058 m. what is the magnitude of the external electric field?