According to newton's 3rd law of motion, an action creates
an accelerated reaction
an equal action
an equal and opposite reaction
a force of equal action

prolly a beacuse the momentuem the car has increases while going down hill

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

earth's neighboring galaxy, the andromeda galaxy, is a distance of 2.54×107 light-years from earth. if the lifetime of a human is taken to be 70.0 years, a spaceship would need to achieve some minimum speed min to deliver a living human being to this galaxy.