Why hydrogen absorption lines are weak in o and m stars
What is the fundamental explanation (in terms of atomic physics) of why hydrogen absorption lines are weak in O and M stars and strong in A stars. Why are molecular absorption lines strong in K and M stars but weak in O, B and A stars?
Now Priced at $5 (50% Discount)
Recommended (98%)
Rated (4.3/5)
a) Determine the mean production of acorn in the last six years. b) Calculate the standard deviation of data relative to acorn production.
Kelvin and Helmholtz thought they had the answer. What was their idea and what 19th century evidence showed that they were wrong?
A red star and a blue star have the same size and are at the same distance from Earth. Which one looks brighter in the night sky? Why? (Ignore the interstellar reddening)
Write an Indigenous health issue, the impact that this health issue has on Indigenous peoples and identify programs for achieving better health outcomes
What is the fundamental explanation (in terms of atomic physics) of why hydrogen absorption lines are weak in O and M stars and strong in A stars.
Use methods of descriptive statistics to summarize the data. Comment on the findings.
Sketch a Hertzsprung-Russell diagram: label the axes, marking off the scales. Indicate the regions on your diagram occupied by main sequence stars, red giants, supergiants, the Sun.
Describe how we measure distance using "spectroscopic parallax". What is the practical limitation in using this technique, and what is the approximate distance (in parsecs) out to which this technique is useful.
Suppose that star B also only has half the surface temperature of star A, what is the energy flux from the surface of star B compared to star A? What is the ratio of the radius of star B over the radius of star A.
1924267
Questions Asked
3,689
Active Tutors
1430770
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Question: Which of the following statements concerning drug treatment is true? Question options:
A 72-year-old woman who has trouble falling asleep asks you about melatonin. You advise:
What risk factors does JD have for DVT? Would you consider this DVT provoked or unprovoked and how would you mitigate these risk factors going forward?
A major goal in Healthy People 2020 is to improve the health literacy of the population. Which of the following objectives is NOT related to that goal?
65-year-old man comes to the clinic with complaints of loss of energy, weight gain despite healthy eating and activity when he can stand it
Explain the heuristics of interview questions to the individual and provide 2 to 3 examples of precisely worded questions
Question: In the hands of a knowledgeable agent, a checklist can accomplish all the following, EXCEPT