A solution contains 30g of KNO3 per 100g of water at 20c is the solution unsaturated , saturated, or supersaturated

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.

it would only be the stuff in module eight so you need to study all the lessons in that you also could check the flvs

hope this : )