john made a stethoscope using a paper cup and plastic tube write down the procedure you followed
Answers
Explanation:
You can make a super simple one with a funnel and a balloon. Start by cutting the tail-end of a balloon off, then pull it over the larger opening of a funnel. Pull it tightly enough so that it is stretched taut over the funnel, like a drum. If the balloon keeps coming off, wrap a piece of electrical tape around the edge to hold it to the funnel. Find some clear, flexible, plastic tubing that's wide enough for you to stick the end of the funnel into. Measure 24 inches (61 cm) of the tubing, cut it, then stick the narrow end of the funnel into it. If you want to make the stethoscope a little more powerful, add a second matching funnel to the other end of the tube. Place the balloon-covered end over your heart or someone else's heart, and the other end against your ear to use the stethoscope.