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 1.55 ⋅ 10^7 seconds?

Part B: Which is the more reasonable measurement of the diameter of a human hair:

1.8 ⋅ 10^-2 mm or 1.8 ⋅ 10^2 mm? Justify your answer.

Question

Mathematics

Roy

17 November, 02:25

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 1.55 ⋅ 10^7 seconds?

Part B: Which is the more reasonable measurement of the diameter of a human hair:

1.8 ⋅ 10^-2 mm or 1.8 ⋅ 10^2 mm? Justify your answer.

+1

Answers (2)

Know the Answer?

Monique Atkinson · Answer 1

Part A:

The sun produces 3.9 ⋅ 10^33 ergs of radiant energy per second

so

(3.9 ⋅ 10^33) (1.55 ⋅ 10^7)

= 6.045 x 10^40

Part B:

1.8 ⋅ 10^2 = 180 mm

1.8 ⋅ 10^-2 = 0.018 mm

human is very tiny, so it can't be 1.8 ⋅ 10^2 mm

answer is 1.8 ⋅ 10^-2 mm

Woodward · Answer 2

Part A

3.9 * 10^33 * 1.55 * 10^7

3.9 * 1.55 = 6.045

10^33 * 10^7 = 10^40

6.045 * 10^40

Part B

1.8 * 10^-2 mm, because a negative exponent makes the answer smaller

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 1.55 ⋅ 10^7 seconds?Part B: Which is the more reasonable measurement of the diameter of a human hair:1.8 ⋅ 10^-2 mm or 1.8 ⋅ 10^2 mm? Justify your answer.

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 1.55 ⋅ 10^7 seconds?

Part B: Which is the more reasonable measurement of the diameter of a human hair:

1.8 ⋅ 10^-2 mm or 1.8 ⋅ 10^2 mm? Justify your answer.