Using first the customary ruler and then the metric ruler, measure the length of the side of the wooden

block. Remember to estimate to one place value

beyond the rulers' gradations.

1 3/32 in inches

y 2.78 cm centimeter

COMPLETE

Calculate ratios for the number of centimeters in

an inch and the number of inches in a centimeter:

cm in or in/cm

1

Hength

DONE

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explanation:

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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.