POSSIBLE Which is the main difference between physical changes and chemical changes?
O A physical change forms one or more new substances but a chemical change does not.
A chemical change forms one or more new substances but a physical change does not.
Substances change state of matter only by undergoing physical changes, not chemical changes.
O None of the other answer choices
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A substance undergoes a chemical change. The result is a new substance with new properties. However, when a substance undergoes a physical change, it is often reversible. The substance has new physical properties, but its chemical properties do not change.

idk

explanation:

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.