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50 POINTS AND BRAINLIEST PLS ANSWER FAST AND EXPLAIN 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.

Respuesta :

bveazey

Answer:

a. 0.48

b102mm

Step-by-step explanation:

mhanifa

Answer:

  • Part A. 5.85 · 10^40 erg
  • Part B. 1.8 ⋅ 10^−2 mm

Step-by-step explanation:

Part A

Multiply the numbers and find the product:

  • 3.9 ⋅ 10^33 × 1.55 ⋅ 10^7 =
  • 3.9 × 1.5 · 10^(33 + 7) =
  • 5.85 · 10^40

Part B

  • 1.8 ⋅ 10^2 mm = 1.8·100 mm = 18 cm is too much for the human hair

Therefore more reasonable number is:

  • 1.8 ⋅ 10^−2 mm

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