a sign that weighs 750 N on Earth i brought to Pluto, which has a gravitational field strength of 0.62 N/kg. What is the weight of the sign on Pluto?

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.)

How would a small bar magnet be oriented when placed at position x?

The speed of light can be used to measure the