The laws of refraction and reflection are the same for sound as for light. the speed of sound in air is 340 m/s and in water it is 1510 m/s. if a sound wave approaches a plane water surface at an angle of incidence of 12.0 °, what is the angle of refraction?

Need asap ‼️ 20 pts which gravitational force field diagram is drawn correctly? (answers in pictures below)

J. j. thomson’s experiment disproved the theory that an atom

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.