A ball is pushed from a stop and rolls 6 m in 2 s. Student A says the average speed of the ball is 3m/s. Student B says the average speed of the ball is 1.5m/s

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

What is the independent variable in this investigation? mass volume sample number substance density

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5