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

What do you think car designers do if the damage caused by a crash test is too severe?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.

What component of earth’s atmosphere exists entirely as a result of photosynthesis?