One 75-watt bulb gives more light than three 25-watt bulbs.
57
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Iron weighs more after it rusts.
68
The force of a suction cup is calculated using F=AP.
15
German chemists made a replica of a trophy the size of one molecule.
68
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55