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Physics Coursework Speech - Lead

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Introduction

Physics Coursework Speech Dave King 12NI Lead is one of the most widely used metals in the world but due to variable factors, it is rarely seen. It is normally hidden from view in such things as computer and TV screens, perfecting golf clubs, under car bonnets, batteries and probably most importantly radiation shielding. Contrary to popular belief lead is not used in pencils or household paint. But today I'm not hear to talk about everyday uses for but more specifically the role that lead plays in shooting and air rifle sports. Lead is a bluish-white lustrous metal with the atomic symbol PB. It is extremely ductile and a poor conductor of electricity. ...read more.

Middle

There are many advantages of using lead pellets for shooting, here are a few. 1. Although it is very dense, lead is also extremely malleable therefore making it easy to form and shape. Also lead is a quite abundant metal found worldwide therefore making it fairly cheap to buy. It is mined in most continents such as North America, South America, Europe, and Africa etc. Contrasting with the many advantages of lead are the also plentiful disadvantages. The main disadvantage and also the reason lead was banned in wildfowling shooting, is the fact that it is a toxic material. It affects the gut, nervous system and causes anaemia. ...read more.

Conclusion

As shown here. PIC OF DISTORTED PELLETS. Not only by changing lead to zinc is pollution decreased, but performance is increased. The new materials used in the Prometheus pellet are said to produce a self-lubricating body for the pellet. This enables the pellet to travel at maximum velocity with least friction in the muzzle and therefore keeping the performance to the highest level. The co efficient of friction for lead is 1.5 where as the Prometheus pellet is 0.9. Another boast of the Prometheus pellet is that the highly polished head reduces air resistance. PIC OF PELLETS IN WIND TUNNEL That's basically all I have today, I hope you have enjoyed it and I will be willing to answer any questions you have to the best I can. ...read more.

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