One barrel of petroleum holds 42 gallons.
20
One ragweed plant can release as many as one billion grains of pollen!
51
The force of a suction cup is calculated using F=AP.
15
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Nylon is made from coal and petroleum.
42
Pure water (H2O) does not conduct electricity on its own.
46
Research indicates that plants grow healthier when they are stroked.
173
