calculate the power of a pump which lift 800kg of water through a vertical height of 12cm in 0.3minutes assuming gravity= 9.8 metre per second​

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

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.

How is an electron dot structure used to represent a covalent bond?