Grey decides to take his jet ski out for a spin. He first skis 6 meters south and then turns west and skis 8 meters. What is Grey's distance from the dock? What is his displacement from the dock? Make sure to show all your work and provide proper units and direction. Finally, determine which measurement is a vector quantity and which is a scalar quantity.

When an object is heated it contracts. a. true b. false

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.

Most short-period comets do not have randomly oriented orbits because