One 75-watt bulb gives more light than three 25-watt bulbs.
57
The average temperature at 40,000 feet above sea level is -60 F.
56
Sound travels about 4 times faster in water than in air.
408
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
In Arizona, a solar wind energy tower has been proposed that would generate as much energy as the Hoover Dam.
5
Sound at the right vibration can bore holes through a solid object.
134
Pure water (H2O) does not conduct electricity on its own.
46