give answer from picture
Answers
Explanation:
sandclock_
Pour the salt or sand into one of the jars. Cut a circular piece of paper that is big enough to fit over the opening of the jar. Punch a hole in the middle of the piece of paper and put the paper over the jar. Place the second jar upside down on top of the first jar so that the openings are lined up with each other..
Stethoscope_
Put the small end of the funnel in one end of the flexible tube. Push the funnel as far you can into the tube to ensure a snug fit.
Tape the funnel into place using duct tape.
Inflate the balloon to stretch it out. Let the air out and then cut the neck off of the balloon.
Stretch the remaining part of the balloon tightly over the open end of the funnel, duct taping it into place. This creates a tympanic membrane for your stethoscope. Now it's ready to use.
Place the funnel end of the stethoscope on your child’s heart and the end of the tube to his ear.