A positive charge of 6. 0 × 10-4 C is in an electric field that exerts a force of 4. 5 × 10-4 N on it. What is the strength of the electric field? StartFraction N over C EndFraction.

Which statement best describes how private industry decides where to spend the money on research and development

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.

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)