Sound travels about 4 times faster in water than in air.
408
Iron weighs more after it rusts.
16
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Billions of neutrinos pass unnoticed through your body every second.
6
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
The force of a suction cup is calculated using F=AP.
15