What are the two things that determine gravity? (4 points) select one: a. mass and size b. mass and distance c. size and shape d. shape and distance

What is binding energy and separation energy

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.)

Aplane travels 1000 miles in 5 hours .what is the planes average speed?