Cell membranes contain channels that allow ions to cross the phospholipid bilayer. suppose that a particular potassium channel carries a current of 2.0 pa. how many potassium ions (k ) pass through it in 1.0 ms

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

What is a subatomic particle with a negative charge and very little mass?

By what factor does the drag force on a car increase as it goes from 65 to 110 km/h?