If you do smoke frequently, expect to test positive on a marijuana drug screen for anywhere from 3 weeks to almost 2 months. If you smoke everyday or several times a day, you can test positive for 2 months or more. Detection times also vary depending upon your weight, metabolism, and other person factors.
Definition: A transducer is a device that converts one form of energy â typically a signal â into another. Example: A speaker is a type of transducer that converts electrical energy (the audio signal) into mechanical energy (vibration of the speaker cone/diaphragm).
Introduction. Transcutaneous electrical nerve stimulation (TENS) is a method of pain relief that can help some people with long-term painful conditions.A TENS machine is a small, battery-operated device that has leads connected to electrodes. You attach the electrodes to your skin using self-adhesive pads.ntroduction. Transcutaneous electrical nerve stimulation (TENS) is a method of pain relief that can help some people with long-term painful conditions.