Answer:
Step-by-step explanation:
To find out how many years the United States could run on the energy released by a 10²³ J solar flare, we need to divide the energy of the solar flare by the energy consumed by the United States in one year:
Number of years = Energy of solar flare / Energy consumed by the United States per year
Number of years = 10²³ J / 2.5 x 10¹⁹ J/year
Number of years = 4 x 10³ years
Therefore, the United States could run for approximately 4,000 years on the energy released by a 10²³ J solar flare.