The force of a suction cup is calculated using F=AP.
15
The average home creates more pollution than does the average car.
33
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Iron weighs more after it rusts.
16
One ragweed plant can release as many as one billion grains of pollen!
51