Ascientist has found two samples of radioactive material. the first sample has a mass of 1.0 g and an activity of 2.0 mc022-1.jpg 109 decays per second (d/s). the second sample has an activity of 3.0 mc022-2.jpg 109 d/s. according to the curies’ findings, what is the mass of the second sample?
1.0 g1.5 g5.0 109 g6.0 1018 g

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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.