Imagine you push a book across an incredibly slippery surface. it slides right across because there is no fiction. 'ext, you push the same book across a rougher surface that exerts fiction. Now the question:

Will the velocity of the book change as it moves across the surface with no fiction? Explain your answer

Another question:

Will the velocity of the book change as it moves across the surface WITH friction? Explain your answer.

i believe the answer is true.

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.

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.