If a mass of 0.75 kg attached to a vertical spring stretches the spring 5.0 m from its original equilibrium position, what is the spring constant?

Two large, flat, horizontally oriented plates are parallel to each other, a distance d apart. half way betwween the two plates the electric field has magnitude e. if the separation of the plates is reduced to d/2 what is the magnitude of the electric field half way between the plates?

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.