How do objects with the same charge behave?
a. they don't do anything different. b. they move.
c. they catch on fire. d. they move apart.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

What part of the ear is names after tools, such as the hammer and the anvil?