Which is a valid velocity reading for an object? A.45 m/s
B. 45 m/s north
C. 0 m/s south
D. 0 m/s

What are similarities and differences of reflection, refraction, diffraction and absorption?

Two trains leave a station at the same time, train a travels at a constant speed of 16 m/s. train b starts at 8.0 m/s but accelerates constantly at 1.0 m/s squared. after 10.0 seconds, which train has the greater speed?

The law of reflection states that the angle of reflection is equal to the angle of