the first stone pyramid was built in egypt in 2580 bc.
the first stone pyramid was built in egypt in 2580 bc.
when was the first stone pyramid built in egypt?
2580 bc
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it is unknown whether the ancient egyptians had kites, but a team led by maureen clemmons and mory gharib raised a 5,900-pound, obelisk into vertical position with a kite, a system of pulleys, and a support frame. maureen clemmons developed the idea that the ancient egyptians used kites for work. ramps have been reported as being widely used in ancient egypt. a ramp is an inclined plane, or a plane surface set at an angle (other than a right angle) against a horizontal surface. the inclined plane permits one to overcome a large resistance by applying a relatively small force through a longer distance than the load is to be raised. in civil engineering the slope (ratio of rise/run) is often referred to as a grade or gradient. an inclined plane is one of the commonly-recognized simple machines. maureen clemmons subsequently led a team of researchers demonstrating a kite made of natural material and reinforced with shellac (which according to their research pulled with 97% the efficiency of nylon), in a 9 mph wind, would easily pull an average 2-ton pyramid stone up the 1st two courses of a pyramid (in collaboration with cal poly, pomona, on a 53-stone pyramid built in rosamond, ca).
ancient egyptian technology