Based on your knowledge of refraction and the data provided, what will be the speed of light through glass? 200,000,000 m/s B) 300,000,000 m/s C) 450,000,000 m/s D) 500,000 m/s

(its A)

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

Why does lightning travel from clouds to the ground?

Two identical stars with mass m orbit around their center of mass. each orbit is circular and has radius r, so that the two stars are always on opposite sides of the circle. (a) find the gravitational force of one star on the other. (b) find the orbital speed of each star and the period of the orbit. (c) how much energy would be required to separate the two stars to infinity?