When discussing how charges interact, we can say that

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Determine the maximum r-value of the polar equation r =3+3 cos 0

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?