Part a: the sun produces 39.x10^33 ergs of radiant energy per second. How many ergs of radiant nergy does the sun produce in 3.25x10^3 seconds? (5 points) Part b: which is the more reasonable measurement of the distance between the tracks on a railroad: 1.435x 10^-3mm or 1.435x10^3 mm? Justify your answer. (5points)