When a wave hits a surface through which it cannot pass and bounces back, it undergoes a. reflection. b. refraction. c. constructive interference. d. destructive interference.

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.

according to jean piaget, in what stage of cognitive development are children able to understand conservation task?

b. preoperational

just took it