A book sits motionless on a table. Which statement is true? Group of answer choices There are no forces acting on the book. The forces acting on the book are balanced by each other. The upward force is greater than the downward force on the book. The downward force is greater than the upward force on the book

c. electrical charges of ionic bonds.

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.