What volume of gold would be equal in mass to a piece of copper with a volume of 116 mL? The density of gold is 19.3 g/mL; the density of copper is 8.96 g/mL.

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

answerspecific gravity;

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.