Part A: The sun produces 3.9 ⋅ 1033 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 2.45 ⋅ 105 seconds? (5 points) Part B: Which is the more reasonable measurement of the diameter of a blood cell:
7.4 ⋅ 10−3 mm or 7.4 ⋅ 103 mm? Justify your answer. (5 points)

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Explanation:

part A

we know how much erg of radiant energy the sun produces for one second so to find out how much it produces for 2.45 ⋅ 10^5 seconds we only should multiply these seconds to the erg of radiant energy it produces for one second

amd we get 9.555*10^38erg of radiant energy

Part B:

0.0074mm knowing that blood cell is very small to be seen normally without microscope.

and 7400mm is a measure that is quite big for a blood cell. So it remains that 7.4*10^-3 is the right one.

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

our current president donald trump