1. If you walk 3 kilometers in 30 minutes, what is
your average speed in
kilometers per hour?
2. What distance will a
truck travel in 3 hours at
an average speed of 50
miles per hour?

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.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Write down two additional questions about earth's magnetic field that will make your presentation more informative.