Question

I NEED JUSTIFICATION AND WORK ON PART A AND B

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? (5 points)


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

1.8 ⋅ 10−2 mm or 1.8 ⋅ 102 mm? Justify your answer. (5 points)

Answer 1

6.045 * 10 ^40 ergs

1.8 * 10^-2 mm

Explanation:

3.9 ⋅ 10^33 erg per second * 1.55 * 10 ^7 seconds

3.9 * 1.55 * 10^(33+7)

6.045 * 10 ^40 ergs

Human hair is around .1 mm thick

.1 = 1 * 10 ^ -1

This is closer to 1.8 * 10^-2

1.8 *10^2 = 180 mm which is too thick This is approximately 18 cm

Explanation:

Answer 2

6.045 * 10 ^40 ergs

1.8 * 10^-2 mm

Explanation:

3.9 ⋅ 10^33 erg per second * 1.55 * 10 ^7 seconds

3.9 * 1.55 * 10^(33+7)

6.045 * 10 ^40 ergs

Human hair is around .1 mm thick

.1 = 1 * 10 ^ -1

This is closer to 1.8 * 10^-2

1.8 *10^2 = 180 mm which is too thick This is approximately 18 cm