Things that float or sink on water: 1)penny: sinks 2)twig: floats 3)pen cap: floats 4)small leaf: floats 5)rock: sinks 6)paper clip: sinks do you think you would get the same result if these items were dropped into a glass of vegetable oil of water ? ( a scientific or a good explained answer plzzz)

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?