What did Robert Millikan discover? A. He determined the radius of oil drops.
B. He determined an electron's charge.
C. He discovered that electrons orbited inside an atom.
D. He discovered the nucleus of the atom.

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume