A6,000 kg train car is moving to the right at 10 m/s and connects to a 4,000-kg train car that wasn't moving. what is the velocity of the carts after the collision? what type of collision is this?

What heat is removed how does a gas become a liquid

Which of the following is a cost of urbanization? a-cities can provide a high standard of living. b-cities are hubs of entertainment and education. c-paving over land changes the environment. d-job opportunities are greater in urban centers.

Which of these resources is used worldwide to make construction products, pottery, and porcelain