Yes.
2 years....
Yes.
two weeks it depens
The most common drugs which can be detected on a drug test are; marijuana, cocaine, PCP, amphetamines and opiates.
marijuana normally can be detected up to 28 days after smoking or eating but beware if your getting a hair folicle drug test these can go back as far as 6 months
if you're talking about a hair strand drug test, my understanding is that marijuana can be detected in the strands of your hair for about a year.
Sure. THC the main ingredient in MJ can be detected in any kind of test - hair, saliva, urine, blood. This is the most recognizable drug and it's stays longer than any other drug in your system.
Pretty much anything can be detected in a drug test.
It is unlikely that you would fail a drug test from someone blowing marijuana smoke in your face, unless you were in an enclosed space with heavy exposure. Passive inhalation typically results in very low levels of THC in the system, which are unlikely to be detected in a drug test.
No. Very trace amounts MAY be detected if you're in the middle of a closet clambake.
no
the THC wud not be produced due to lack of heat, which is essential to release the active ingredient found in marijuana. ur safe