A physics teacher walks 4 meters East, 2 meters South, 4 meters West, and finally 2 meters North. What is her distance and what is her displacement.

Bone-strengthening physical activity done increases bone-mineral content and bone density in youth.

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.)

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of