According to the position-time graph shown, what is the biker’s displacement at time t=3.0s? a. 8.0 m c. 15.0 m b. 12.0 m d. 20.0 m

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 softest and hardest minerals are: softest hardest

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?