Which best blocks x-ray particles and can therefore be observed more closely through the use of this technology?

a. organs
b. muscles
c. fluids
d. bones

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

Asap and show ! a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)