volume of drop = V = (4/3) pi r^3
mass of drop = m = 1000 * V
gravity down = F = m g
force up = Q E = F
number of excess electrons = Q /e
The earth has an electric field of about 150 N/c pointed downward. A 1.00 (micrometer) radius of water droplet is suspended in a calm air. Find the
1) mass of the water droplet
2) charge on the water droplet
3) number of access electrons in the water droplet.
1 answer