The Best Material : Plastic

Imagine the world without plastic! It is very difficult isn't it ? Cause if you think about it, almost every piece of thing you may touch is made up of plastic or has one or more plastic components. Water bottle, cups, pens, keyboard, sun glasses and a lot of other things are made of plastic. The first utility of this man-made wondering material is staggering. Plastic can be made lite and delicate as sandwich nylon, or very tough like police shield, even this shield is just 4 mm. thick it can easily resist any attack. This is not surprising when you consider that makers test them with impacts from fire access and even from shoot gun pullets....

Science Facts beyond Ice Baths

Ice might be good for keeping food fresh but generally speaking, ice and human body don't mix ;) which is perhaps not surprising when you consider over 65% of the human body is made out of water. So, generally if you want to live a long life, keep in your mind trying not to get too cold. However, scientifically under controlled conditions at certain situations ice can be very effectual. In fact, doctors have been prescribing it for years to help reducing the swilling and help in speeding up the healing process for traumatized body parts. Nowadays, there is a belief among sports' professionals that Ice can speed up recovery of...

History of Telephone

The technology that is founded in our entire telephone system is the carbon string telephone, as I'm sure you remember from school the experiment of tying two plastic cups with a string. The plastic cup acts as diaphragm, they vibrate among speaking. As long as the string is tied, those vibrations travels to the cup at the other end. That cup also acts like diaphragm and converts those vibrations back into sound so you can hear you voice. This basically transmission of sound by telephone, and it was discovered in the 19th century by Oxy'Pharm produced the first device to transmit a human voice by wire. Workers began stringing out couples...

Diamonds

If you thought the sparkle on your finger was the only diamond in your life, then think again because industrial diamonds exist all around us, even the tiles on your toilet would probably cut with a diamond plate. Top quality naturally occurring diamonds coast thousands of dollars, but an entire small dish of synthetically grown diamonds coasts around 50 dollars !! In fact, the majority of diamonds used in industry are grown synthetically. Man made diamonds are first created in the early 1950s using high temperature and high pressure, and the basic ingredient .. Carbon ! In fact, giving the right conditions you...

Rocketry: Thrust

     Of all the different methods of propulsion invented by mankind, and for pure highly excitement, nothing really compares to rockets. How about the biggest rocket of all time. Imagine 50 jumbo jets at full power strapped to a 36 story building, That's Saturn-5 . It takes something like this to transport a man to the moon, but where does the colossal thrust actually come from ?? Inside the rocket motor, fuel is turned to gas through combustion, and the gas is then forced out the back. The reason why escaping gas pushes the rocket forward, is explained by Newton third law...

Science Behind Rockets

Since the invention of rockets by the Chinese eight hundred years ago, military men the world over have been keen to acquire the destructive power of the black powder. But there is one big problem which mystify them for centuries. How on earth do you get them to fly straight ?? One early modification to improve accuracy was the addition of a long stick, and the length of the stick really does effect how straight our rocket flies. To be honest, the real art of getting rocket to fly straight in true is making it spin. The gyroscopic effect makes the flight much more stable. During the 20th century, the science of rocketry...

Infrared Camera Pointed on Microwave

     Now it's time to look at every day objects using an Infrared camera. Hot things give up lots of infrared while cold things give up less, and this camera can actually do what our eyes can't. It Can See The Variations of Temperature. Today we're going to know what will you see if we point the infrared camera on 850 degrees centigrade microwave oven. Microwaves cook by firing electromagnetic radiation at the molecules of food, causing them to vibrate and heat up. Opening up a microwave to look at in it isn't recommended, but our camera determines the location of hot magnet on core that creates the microwave....

Science Behind Longbows

     Wood is one of the most tough materials on planet earth. It's environmentally friendly and it grows on tree. There are thousands of different types of wood but there is one in particular that interests us : Yew, for many good reasons. 'Yew' is the wood of choice for making longbow. Now, why Yew is so perfect for making longbows ?? Well, two main reasons : a longitudinal part from its natural tree shows two distinct sections; * Very pale colour sap wood contrasting with the * Orange hard wood . (adsbygoogle = window.adsbygoogle || []).push({}); The sap wood is very good in resisting tension...

Magnets Can Destroy your Computer !

Magnets .. a lot of fun but pretty harmless, or are they ?? Could it be possible for this small bar of metal to wipe the memory of your computer ?? Destroying your life's work ?? The theory is, that if you leave your laptop near a sufficiently big magnet, it'll erase or scramble everything of its hard drive. To understand how could this happen, we need to go back to basics. Well, hadr drive stores information magnetically as it works in a similar way to childhood experiment of magnet ( observing how magnets change the direction of Iron filings). The hard drive disc is coated with a magnetically sensitive material that can be...