Does the table push upwards on the glass of water?

A) Yes

B) No

Can someone explain to me how to do this problem ?

Which is not a step in the rock cycle?

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.)