If is given that radium decomposes at a rate proportional to the amount present. If `p %` of th original amount of radium disappears in `l` years, what percentageof it will remain after `2l` years?

A radioactive substance disintegrates at as rate proportional to the amount of substance present. If 50% f the given amount disintegrates in 1600 years. What percentage of the substance disintegrates i 10 years ? (-log2)/(160)T a k ee=0. 9957

Experiments show that radium disintegrates at a rate proportional to the amount of radium present at the moment. It's half life is 1590 years. What percentage will disappear in one year? [Use e^(-log2/1590)=0. 9996 ]

Experiments show that radius disintegrates at a rate proportional to the amount of radium present at the moment. Its half life is 1590 years. What percentage will disappear in one year? [Use e^(-log2/1590)=0. 9996 ]

Radium decomposes at a rate proportional to the quantity of radium present. It is found that in 25 years, approximately 1.1% of a certain quantity of radium has decomposed. Determine approximately how long it will take for one-half of the original amount of radium to decompose? [Given (log)_e 0.989=0. 01106a n d(log)_e2=0. 6931 ]

Half life of a ratio-active element is 8 years, how much amount will be present after 32 years ?

A radioisotope has half life of 10 years. What percentage of the original amount of it would you expect to remain after 20 years?

The half-life period of radium is 1600 years. The fraction of a sample of radium that would remain after 6400 years is.

The rate at which radioactive substances decay is known to be proportional to the number of such nuclei that are present in a given sample. In a certain sample 10% of the original number of radioactive nuclei have undergone disintegration in a period of 100 years. Find what percentage of the original radioactive nuclei will remain after 1000 years.

Radium Ra^236 has a half-life of 1590 years. How much of the original amount of Ra^236 would remain after 6360 year ?

The present population of a town is 28000. If it increases at the rate of 5% per annum, what will be its population after 2 years?