Suppose somebody proposed that rather than invoking dark matter to explain the increased orbital velocities of stars beyond the sun’s orbit, the problem could be solved by assuming that the milky way’s central black hole was much more massive. does simply increasing the assumed mass of the milky way’s central supermassive black hole correctly resolve the issue of unexpectedly high orbital velocities in the galaxy? why or why not?

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.