Materials

two ping-pong balls
tape
thread
soda straw
hanging apparatus (table, overhang on a counter)
ruler

Experiment Set Up

Cut two pieces of thread about 25 centimeters long each.

Tape one end of the thread to a ping-pong ball and attach the other end of the thread to the hanging apparatus.

Repeat this with the other ping-pong ball, one to two centimeters away from the first ping-pong ball.

Experiment Procedure

1. Hold the end of the straw about five centimeters away and perpendicular to the space between the ping-pong balls.

2. Without making contact with the ping-pong balls, blow steadily through the straw.

3. Observe and record.