Down stream it would be going 20 mph and up stream 10 mph
Answer:
White dwarfs are likely to be much more common. The number of stars decreases with increasing mass, and only the most massive stars are likely to complete their lives as black holes. There are many more stars of the masses appropriate for evolution to a white dwarf.
Because it can pollute the air and cause wild life to eat stuff that has been contimanted by the air
Positively charged protons in the nucleus of the gold atom .... rutherford scattering ???