Bro when i tried to get on like 50 mins ago it pop up like dis

Two technicians are discussing how to test a car's exhaust by holding a small piece of paper within an inch of the tailpipe mouth. technician a says that if the paper is vibrating due to a "puffing" output from the tailpipe, this signals a smoothly running engine. technician b says that if the paper is being drawn toward the tailpipe, this could indicate burned exhaust valves. who is correct? a. technician b b. both technicians a and b c. technician a d. neither technicians a or b

Which of the following is a presentation cue? a. crossing your arms b. mumbling c. repeating words d. whistling

Why are gold and platinum used for jewelry