Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Sound travels fifteen times faster through steel than through air.
134
The force of a suction cup is calculated using F=AP.
15
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The banana plant cannot reproduce itself. It can be propagated only by the hand of man.
155
The average home creates more pollution than does the average car.
33
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51