The frequency of a ray of light is 5.09 x 10^14 hertz. What is the ratio of the speed of this ray in diamond to its speed in zircon

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

Agirl throws a ball. if the ball's acceleration is 12 m/sec/sec and its mass is 0.5 kg, how much force did the girl apply to the ball?

The temperature of a solution can change the solubility of a substance. the chart shows the solubility of the same solute at different temperatures in water. based on the chart, which solution was at the optimal temperature to allow for the greatest solubility? w x y z