An aluminum can, a paper cup, an alcohol spray, a pair of scissors, a lighter, a hot melt glue gun and a chopstick.

Second, the experimental steps

Step 1: Make the jar into the barrel of an alcohol gun. Use scissors or nails to make a small hole with a diameter of about 1 mm at the bottom of the can; Then make the chopsticks into the bracket of the gun barrel, cut the chopsticks into about 5 cm with scissors, put a paper cup on the bottle mouth of the can, mark it, and then stick the cut chopsticks on the marked position with a hot melt adhesive gun.

Note: the bracket must be firmly connected, otherwise it may fall over during launch.

Step 2: Test the effect of alcohol cannon. Spray alcohol spray into the jar mouth for seven times, and then quickly cover the jar mouth with a paper cup. Find a suitable location (where the launching angle is empty), aim the starting gun at the small hole at the bottom of the can and light it, and the paper cup at the bottle mouth will be launched with a bang. So the whole experiment is completed.

Note: When putting the paper cup on the bottle mouth of the can, pay attention to the tightness. The lid of the paper cup should not be too loose or too tight, otherwise it will affect the launching effect. If there is no lighter at home, you can light it with a candle. Try not to light it directly with lighters or matches.

Third, security issues.

1. When launching, make sure there is no one within 5 meters ahead.

All participants in the experiment must pay attention to protecting their eyes, and it is best to wear goggles.

Children must be accompanied by their parents or teachers when doing this experiment.

When doing this experiment, there must be no inflammable and explosive materials around.

Fourth, the experimental principle

The alcohol sprayed into the tank will volatilize in a short time and fill the whole tank. When it meets an open flame, it will burn instantly, and the air in the tube will expand instantly, thus making a loud noise to start table tennis.