The atomic number of carbon is 6 and the atomic number of nitrogenis 7. how do the number of neutrons and protons in the nuclei of carbon-14 and
nitrogen-14 differ?

Here's what I get  

Explanation:

Carbon has 15 isotopes ranging from C-8 to C-22 but only two of them (C-12 and C-13) are stable. C-12 is the more abundant of the two.

Nitrogen has 16 isotopes ranging from N-10 to N-25, but only two of them (N-14 and N-15) are stable. N-14 is the more abundant of the two.

If you are talking about C-12 and N 14, we can say that

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

d.) circle motion requires a force to give it a centripetal acceleration.