On a day wilderness expedition you'll need to heat of water to the boiling point each day. The air temperature will average . You have available canisters of compressed propane fuel, which you'll burn to heat the water. Each canister has of propane in it. What is the minimum number of fuel canisters you must bring

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.