The force of gravity acting on a child's mass on earth is 490 newtons. what's the child's mass? a. 206 kg b. 4,802 kg c. 50 kg d. 800 kg

If it takes a planet 2.8 x 10^8 s to orbit a star with a mass of 6.2 x 10^30 kg what is the average distance between the planet and the star

Anybody wanna ? (picture included? )

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.