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Semmy [17]
3 years ago
11

The spectra of most stars are dark-line spectra because ________.

Physics
1 answer:
pav-90 [236]3 years ago
5 0
Because dark line spectra result from passing white light through ionized gasses and plasmas, which is what the atmosphere of stars are made of.  These frequencies are scattered by the star's atmosphere as it leaves the surface (photosphere) of the star, and don't make it to earth.
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natka813 [3]

Answer:

2420 J

Explanation:

From the question given above, the following data were obtained:

Force (F) = 22.9 N

Angle (θ) = 35°

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The work done can be obtained by using the following formula:

Wd = Fd × Cos θ

Wd = 22.9 × 129 × Cos 35

Wd = 22.9 × 129 × 0.8192

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Thus, the workdone is 2420 J.

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soldier1979 [14.2K]

Answer:

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4 0
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What is the contour interval of this map? a. 20 feet b. -20 feet c. 60 feet 11​
timofeeve [1]

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what is the contour interval of this map? a.20 b.-20 c. 60 feet 11

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