2. If your average velocity for the first half of a trip is 30 mph and 20 mph for the second half what is your overall velocity?

Which is not a step in the rock cycle?

State one advantage and one disadvantage of using a plane mirrior as a driving mirrior

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?