GUATEMALA CITY - Torrential rains brought by the first tropical storm of the 2010 season pounded Central America and southern Mexico, triggering deadly landslides. The death toll stood at 15 Sunday but authorities said the number could rise.
Archimedes proved the formula for the area of a circle (A = Ï r 2, where r is the radius of the circle) and showed that the value of Ï lay between 3 + 1/7 (approximately 3.1429) and 3 + 10/71 (approximately 3.1408).
If r is the distance from the center of Earth (which is also the center of its gravitational pull), then E2 = 1/2 mv2 â k m/r = constant (2) (2) is a wider definition, holding for all distances from Earth, while (1) only holds near the Earth's surface.