Why did your HP Wi-Fi printer go offline? A: A Hewlett-Packard printer connected to a Wi-Fi network can go offline for many reasons, including interference with the wireless connection to the printer ... Full Answer > Filed Under:
A drug test for marijuana is the analysis of a biological specimen from your body, using urine, blood, hair, sweat or saliva samples to determine how much of the drug is in your system. Testing for marijuana checks for levels of the active ingredient THC, or more commonly for its metabolite THC-COOH.
Approximately 90 percent of drug tests are done as urine tests. Other tests using saliva, hair, sweat and blood samples can also analyze and detect traces of marijuana in your system. Hair testing provides a longer window of detection than urine and can detect drugs taken within the past 90 days.