One cubic foot of gold weighs more than 1,200 pounds!
78
A cubic yard of air weighs about 2 pounds at sea level.
31
If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.
117
One barrel of petroleum holds 42 gallons.
20
In zero gravity, a candle's flame is round and blue.
16
The force of a suction cup is calculated using F=AP.
15
A coal power station puts 100 times more radiation into the air than a nuclear power plant producing the same amount of energy.
7