8. A cross country runner begins a race at a standstill (v=0). At the 10. second mark, her velocity is 5.0 m/s. How far has she run in that time? (Do
not include units in your answer.)

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided