A student wanets to use toilet paper to show the distance of one Astronomonical Unit, or the distance from the sun to the earth. They decided to use a scale factor of 1 square of toilet paper = 100,00km. How many rolls of toilet paper will the student need, if each roll of toilet paper has 500 sqares?

where's the diagram?

i believe the answer is three water molecules

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.