Question

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)


show work pls i need this now

Answer 1

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.

Answer 2

Answer:

(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

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. I have no idea

how they do this, but it's certainly more reasonable than the

other choice.