Conservation laws, such as conservation of momentum, often give a surprising amount of information about the possible outcome of an experiment. here is perhaps the simplest example:. Two objects of masses m1 and m2 are subject to no external forces.
Object 1 is traveling with velocity v when it collides with the stationary object 2.
The two objects stick together and move off with common velocity v`.
Use conservation of momentum to find v` in terms of v, m1, and m2.

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.