A train car with a mass of 32,916 kg traveling north at 1.3 m/s collides and joins with a 35,173 kg train car going south at 0.5 m/s. What is the velocity of the joined cars after the collision?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Heating water for hot cocoa while sitting next to a campfire can be examples of conduction, convenction and radiation at the same time agree disagree it depends how you know