Which statements best describe a composite material? Select all correct answers. a. Composites all contain carbon, which makes them lightweight
b. A compound may have more desirable properties than its components
c. Composites form hydrogen bonds, which makes them stronger than their components
d. a brick made of mud and straw is an example of a composite; a brick made of mud is not

answer: they produce more slow than unicellular organisms.

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.