Aball is dropped from a height of 32 feet. it bounces and rebounds 80% of the height from which it was falling

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.

In the first law of thermodynamics, triangle e=q-w, what does q stand for

How do we measure or think of speed in the united states?