Suppose you were hubble and humason, working on the distances and doppler shifts of the galaxies. what sorts of things would you have to do to convince yourself (and others) that the relationship you were seeing between the two quantities was a real feature of the behavior of the universe? (for example, would data from two galaxies be enough to demonstrate hubble’s law? would data from just the nearest galaxies—in what astronomers call “the local group”—suffice? )

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.