This line is called the chord line. The angle between the chord line and the direction of the air blowing past the wing, called the relative wind, is the angle of attack. ... Geometric pitch is the distance in inches that the propeller would move forward in one revolution if it were rotated in a solid medium so as not to be affected by slippage, as it is in the air. ... Propeller slip is the difference between the geometric pitch and the effective pitch. ...

• Word Count: 1239
• Approx Pages: 5
• Grade Level: High School

He was often so into his geometry that his servants would force him to get into a bathtub and, even while his servants anointed him with oils and perfumes, he would try to draw geometric diagrams on his body in the oil on his skin. ... The method is basically a "geometric method of the lever." ... In Quadrature of the parabola, he finds the area of a segment of a parabola cut off by any chord. ... Not being fully aware that the Romans had taken over the city, a Roman soldier came upon Archimedes while he was drawing geometric figures in the dust on the floor while working on a problem. ...

• Word Count: 1479
• Approx Pages: 6
• Has Bibliography
• Grade Level: High School