Part A: The sun produces 3.9 • 10^33 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 2.45 • 10^5 seconds? Part B: Which is the more reasonable measurement of the distance between the tracks on a DVD: 7.4 • 10^–4 mm or 7.4 • 10^4 mm? Justify your answer.

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Part A: The sun produces 3.9 • 10^33 ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in 2.45 • 10^5 seconds? Part B: Which is the more reasonable measurement of the distance between the tracks on a DVD: 7.4 • 10^–4 mm or 7.4 • 10^4 mm? Justify your answer.

Mathematics
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Part A Just multiply the 2 numbers
the answer would be 9.555
Part B 7.4 * 10^4 mm = 74 meters

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Other answers:

wait so is that how i really do it?^
The first part is 9.555 but what about the exponent of 10 ??
you also have to multiply 10^33 and 10^5
ohhok hold on
so is it 10^165?
No you ADD the exponents
oops ok so it is 10^40
9.55 * 10^38
* sorry 9.555 * 10^38
seconds right?
No ergs amount of radiant energy
thank you very much. You are the best helper ever!! :)
yw as for part B the distances will be very small right? and numbers like 10^4 are very large!!!

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