由 lkjeed 於 2022-07-19 17:15:06 發表 | 累積瀏覽 219
Many historians believe that fireworks originally were developed in the second century B.C. in ancient Liuyang, China. It is believed that the first natural "firecrackers" were bamboo stalks that when thrown in a fire, would explode with a bang because of the overheating of the hollow air pockets in the bamboo.
These are also called planes, helicopters, or UFOs. A sky rocket is a pyrotechnic device made out of a paper tube that propels itself into the air in order to fly. Sky rockets generally have a stick to add stability to the flight of the rocket. Firework rockets that do not have sticks are referred to as missiles.
"Safe and Sane" fireworks are the only fireworks that are legal in California. These fireworks usually don't fly or explode.
Fireworks are a class of low explosive pyrotechnic devices used for aesthetic and entertainment purposes. The most common use of a firework is as part of a fireworks display (also called a fireworks show or pyrotechnics), a display of the effects produced by firework devices.
This name originated around 1881, says the OED, while during World War I, it gained the meaning of a small artillery shell. A petard is more commonly a small bomb but is also a small, loud firecracker. The name might come from an Old French word meaning to fart.
Battery A collection of fireworks devices, such as a group of mortars (finale battery) or a bundle of roman candles (candle battery,) fused together in such a manner that they are fired within a short period of time.
But a very large fireworks show, like the one that takes place by the Statue of Liberty in New York City every year, uses fireworks with shells up to two or three feet in diameter (up to nearly a meter), and those fireworks often reach altitudes of well over 1,000 feet (300 meters).
Category F4 fireworks are fireworks which present a high hazard, which are intended for use only by persons with specialist knowledge and whose noise level is not harmful to human health.
Penalties. It is a misdemeanor crime to violate the California State Fireworks Law. A person convicted of this crime may face a sentence of up to one year in jail, a fine of $500 to $1,000, or both.
California allows some consumer fireworks but only if they are non-aerial and non-explosive. Fireworks that are illegal in California include firecrackers, roman candles, chasers, wire and wooden stick sparklers, and skyrockets.