If both cars are the same mass and hit each other at the same speed (in opposite directions): 1.) They both come to a stop.

2.) They come out of the collision at random speeds.

3.) They come out of the collision at the same speeds they entered it.

4.) They come out of the collision at the same velocities they entered it.

What are similarities and differences between refraction, reflection, diffraction and absorption?

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)

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.