How is momentum conserved in an inelastic collision.

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

What statements accurately describe atoms

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)