How oil drop experiment works

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

If two objects at different te,peraure are in contact with each other what happens to their temperature