Asimple machine containing a bar that can turn about a fixed point is a(n) a. wheel and axle b. lever c. inclined plane d. wedge

Fill in the blank. the number of each type of element in the compound (other than 1) is represented by a small number to the right of the element symbol.

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?