A1-kilogram ball has 8 joules of kinetic energy. what is it speed?

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.)

Explain what happens at the saturation point when adding salt to water at room temperature.

Which levels of government establish and implement educational requirements for minors