ANSWERS: 3

You can work this out. Pressure at sea level is 14 pounds per square inch i.e. each square inch of the surface has 14 pounds of atmosphere above it. The area of the surface of a sphere is 4*pi*r^2, Google tells me that the "radius of the earth in inches" is 251106299. So we feed that all into Googl, and divide the result by 2240 to get it in tons: "4 * pi * 251106299 * 251106299 * 14 / 2240", and get the answer 4.95227891 × 10^15, or about five thousand million million tons.

Approximately 14.7 pounds per square inch.

By bendog on Oct 26th, 2006
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