The force of a suction cup is calculated using F=AP.
15
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Cold water weighs more than hot water.
93
For every gallon of sea water, you get more than a quarter pound of salt.
45
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One barrel of petroleum holds 42 gallons.
20
The left ear is more responsive to words of love and emotion whispered into it than the right.
40
One third of the electricity produced on earth is used to power electric light bulbs!
75