You are driving on a multi-lane road, and other cars keep changing lanes into the gap between you and the car in front of you. you have to keep dropping back, to restore a safe following distance. you should a: slowly move closer to the vehicle in front of you, until nobody changes lanes into the gap. b: speed up whenever a car tries to move into the gap ahead of you, to block them. c: continue dropping back whenever traffic forces you to increase your following distance.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?