the first stone pyramid was built in egypt in 2630 bc -- 2611 bc.
the first stone pyramid was built in egypt in 2630 bc -- 2611 bc.
when was the first stone pyramid built in egypt?
2630 bc -- 2611 bc
Na
Na
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