A 900kg car, traveling 12m/s to the right collides with a 2000kg pickup truck initially traveling 8m/s right. The collision lasts 0.9s, during which the average impact force is 4550N.

answer: the direction of the wind is expressed as the direction from which the wind is blowing. for example, easterly winds blow from east to west, while westerly winds blow from west to east.

explanation:

wavelength divides in half and speed stays the same.

answer///terminator or twilight zone;