Mildred takes a pound of frozen hamburger meat out of the freezer and puts it into the refrigerator. which of the following best describes the direction of heat flow? a. from the air in the freezer to the air in the refrigerator b. from the hamburger to the air in the refrigerator c. from the air in the refrigerator to the hamburger d. from the hamburger to the air outside the refrigerator

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.