Two magnets rest on a table. Because like poles of a magnet repel each other, the magnets exert a force on each other. If magnet 1 is moved closer to magnet 2, magnet 2 will move. This is because-

A. Objects need to touch each other in order to cause movement.

B. Magnets can only exert a force on other magnets.

C. Force can affect objects over distance.

D. Moving magnet 1 changed the force needed to move magnet 2

In 1995 a research group led by eric cornell and carl wiemann at the university of colorado successfully cooled rubidium atoms to the 20-200 nk temperature range. assuming (incorrectly) that the rubidium atoms behave liké particles of a classical ideal gas, calculate the rms speed of a rubidium atom at a temperature of 112.0 nk. in the experiments one particular isotope of rubidium was used, rubidium-87. the molar mass of this isotope is 86.91 q/mol. tries 0/20 submit answer

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?