4. An astronomer uses a spectroscope to observe a faraway galaxy and determines that the spectral lines shift toward the red end of the spectrum. What term should the astronomer use to describe the movement of the galaxy?​

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

Which composition of water moves to begin a deepwater current?

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory