The half-life for the radioactive decay of Ce−141 is 32.5 days. If a sample has an activity of 4.0 μCi after 130 d have elapsed, what was the initial activity, in microcuries, of the sample? Express your answer using two significant figures.

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

a) the particles of the chair are strongly held together.

is there any options? maybe im just not seeing them but i need the options to

-love shrooms

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.