What is the force of repulsion between two charges of 1 coulomb is kept at 1 metre apart in vacuum

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?