Question

PLEASE!!!!!! HELP!!!!!!!!!!!!!!!!!!!!!!!

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 1.55 ⋅ 107 seconds? Express your answer in scientific notation and show your work. (5 points)

Part B: Which is the more reasonable measurement of the distance between the tracks on a CD:
1.6 ⋅ 10−3 mm or 1.6 ⋅ 103 mm? Justify your answer. (5 points)

Answer 1

(3.9 x 10³³) / 1 = X / (2.45 x 10⁵) .

Solve that proportion for ' X ' in the usual way.

If you can't remember how to solve a proportion, then

THAT's what you have to go look up. It's much more

important to you right now than how much energy the

the sun is putting out.

7.4 x 10⁴ mm is the same size as about 243 feet!

If the tracks on a DVD were that far apart, there would not be

room for very many tracks on a DVD. That's not reasonable.

If the tracks are 7.4 x 10⁻⁴ mm apart, then there are about

34,000 tracks in a stripe that's 1-inch wide.

Explanation:

Hope this helps you!