What is the density of the marble?
a. 1.2 g/ml
b. 64 g/ml
c. 0.16 g/ml
d. 400 g/ml

Which force is most responsible for binding together an atom's protons and neutrons? electrostatic gravitational nuclear magnetic

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.)

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?