The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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Chapter 18, Problem 10Q

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The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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If the hottest star in the Carina Nebula has a surface temperature of 51,000 K, at what wavelength (in nm) does it radiate the most energy? Hint: Use Wien's law: ?max = 2.90 ✕ 106 nm · K T How does that compare with 91.2 nm, the wavelength of photons with just enough energy to ionize hydrogen? -The wavelength calculated above is shorter than 91.2 nm. Photons at this calculated wavelength will have more than enough energy to ionize hydrogen. -The wavelength calculated above is longer than 91.2 nm. Photons at this calculated wavelength will have more than enough energy to ionize hydrogen. -The wavelength calculated above is shorter than 91.2 nm. Photons at this calculated wavelength will not have enough energy to ionize hydrogen. -The wavelength calculated above is longer than 91.2 nm. Photons at this calculated wavelength will not have enough energy to ionize hydrogen.

A planetary nebula expanded in radius 0.3 arc seconds in 30 years. Doppler measurements show the nebula is expanding at a rate of 35 km/s. How far away is the nebula in parsecs? First, determine what distance the nebular expanded in parsecs during the time mentioned. Δd = vpc/sTs So we first need to convert the rate into pc/s and the time into seconds: vpc/s = vkm/s (1 pc / 3.09 x 1013km) vpc/s = ? Ts = (Tyr)(365 days/yr)(24 hrs/day)(3600 s/hr) Ts = ? s Δd= vpc/sTs Therefore, Δd = ? pc

How are giant molecular clouds (GMCs), the loci of most star formation, themselves formed out of diffuse interstellar gas? What processes determine the distribution of physical conditions within star-forming regions, and why does star formation occur in only a small fraction of the available gas? How is the rate at which stars form determined by the properties of the natal GMC or, on a larger scale, of the interstellar medium (ISM) in a galaxy? What determines the mass distribution of forming stars, the initial mass function (IMF)? Most stars form in clusters (Lada & Lada 2003); how do stars form in such a dense environment and in the presence of enormous radiative and mechanical feedback from other YSOs?

Answer 2

Question

Chapter 18, Problem 10Q

To determine

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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Answer 3

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Chapter 18, Problem 10Q

To determine

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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Answer 4

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Chapter 18, Problem 10Q

To determine

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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Answer 5

Chapter 18, Problem 10Q

To determine

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

Answer 6

Chapter 18, Problem 10Q

To determine

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

Answer 7

Chapter 18, Problem 10Q

To determine

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

Answer 8

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Answer 9

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Answer 11

Ch. 18 - Prob. 1Q Ch. 18 - Prob. 2Q Ch. 18 - Prob. 3Q Ch. 18 - Prob. 4Q Ch. 18 - Prob. 5Q Ch. 18 - Prob. 6Q Ch. 18 - Prob. 7Q Ch. 18 - Prob. 8Q Ch. 18 - Prob. 9Q Ch. 18 - Prob. 10Q

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

Solution Summary: The author explains that dark nebulae are able to block starlight though its interior is less dense than air that humans breathe.

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The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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Chapter 18 Solutions

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

Solution Summary: The author explains that dark nebulae are able to block starlight though its interior is less dense than air that humans breathe.

Concept explainers

To explain: The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.

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Chapter 18 Solutions

To explain:

The way, dark nebula is able to block starlight though its interior is less dense than air that humans breathe.