Why does a truck that is traveling in the opposite direction to you on the street appear to be moving faster than it would if you were not moving?

Two vectors are shown. which statement best compares the vectors? vector x has greater magnitude than vector y. vector y has greater magnitude than vector x. the vectors have the same displacement. the vectors have the same direction.

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

An alien spaceship is 500 m above the ground and moving at a constant velocity of 150 m/s upwards. how high above the ground is the ship after 5 seconds?