Suppose the milky way galaxy were truly isolated and that no other galaxies existed within 100 million light-years. suppose that galaxies were observed in larger numbers at distances greater than 100 million light-years. why would it be more difficult to determine accurate distances to those galaxies than if there were also galaxies relatively close by?

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Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.