Which part of the comet exists when it is away from the sun? a. tail b. coma c. nucleus d. meteor e. core

If forces acting on an object are unbalanced. true or false

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?

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?