Framing Questions 1. A girl is out running at a steady pace. How could she figure out how fast she is running?

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 difference between a red shift and a blue shift has to do with wavelength frequency. t or f

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false