Question

PLEASE HELP MEE!!!!

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?

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 ⋅ 104 mm? Justify your answer.

Answer 1

hint:
part A:
what is
\[3.9 \cdot {10^{33}} \cdot 2.45 \cdot {10^5} = ...?\]

Answer 2

hint:
Part B:
the tracks on DVD are very tiny

Answer 3

\[9.555 x 10^{38}\]

Answer 4

for part 1

Answer 5

ok!

Answer 6

can you help me more for part b i dont understand it

Answer 7

I have written your hint for part B

Answer 8

oh ok thank you!!!

Answer 9

thank you!!