Suppose that you are riding a bike away from your dog who sits and watches you leave. if you use the bicycle as a reference frame, how does your dog appear to move?

Who was the first scientist to measure speed as distance over time?

How will the system respond to a temperature increase?

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?