You can make fair estimates of the heights if you shoot up beside a building or tall tree.
Experiment 27. To make a pea shooter.
FIG. 41
BENDS
Take a full length piece of No. 6 tubing, smooth both ends and flare them out slightly. This makes an excellent pea shooter. Try it with peas. Do you find that they come out with great speed?
Experiment 28. A pea-shooting match.
Make a target on a piece of paper, hang it up away from the wall or at the edge of the table, and shoot at it (Fig. 40). Do you find that the peas go right through the paper?
Arrange a match with your friends and keep track of the score as in Experiment 25.
Experiment 29. To make a good bend.
A good bend has the same diameter in the bend as in the remainder of the tube (1, Fig. 41). It is rather difficult to make because the tube tends to cave in on the inside of the bend (2) or flatten on the outside (3), or both.