Sound travels about 4 times faster in water than in air.
408
Balsa wood is classified as a hard wood!
41
Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.
65
The force of a suction cup is calculated using F=AP.
15
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
According to studies, men change their minds two to three times more often than women.
72
Pumice is the only rock that floats on water.
14