Eddie Machek, who is earning a master's degree in civil engineering from the University of Akron and who will start a doctoral program in engineering at Georgia Tech this fall, explains the difference between the degrees this way: At a bachelor's level you are going to go out and do what's been done.
A regular urine sample is enough to show the presence of nicotine in urine. Even in case of passive smokers, nicotine in the urine can be detected for 20-25 days at the maximum. Nicotine is only harmful for human in higher dose such as 30 to 60 milligram. However, it is not harmful when it is present in less quantity.
1 Pot stays about 30 to 40 days if you smoke everyday then quit, coke stays about 2 to 3 days, the rest I don't think stays very long maybe a day or two! 2  I have found that it varies by person and by substance. 3  generally, weed stays in your fat cells (and therefore urine) for anywhere from 3 weeks - 3 months.