One 75-watt bulb gives more light than three 25-watt bulbs.
57
Billions of neutrinos pass unnoticed through your body every second.
6
One gallon of used motor oil can ruin approximately one million gallons of fresh water!
71
Sound travels about 4 times faster in water than in air.
408
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79