8. take 3 marbles and place them some distance away with sides touching, tap the outside
marble and send the three crashing into the group of two. your partner should try to catch
the escaping marbles before they hit the floor. try this several experiment times, and
record what happens:

it is stable as it is in group 0 which have full outer shells of electrons

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.