57 422
Assignments Done
Successfully Done
In February 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Astronomy | Astrophysics Question for Ambre

Question #18160
Calculate the escape velocity from a red giant's atmosphere. Assume that the stars mass is 1 M and its radius is 100 R. How does this compare with the speed at which a planetary nebula shell is ejected?
I already calculate the escape velocity and got 1.34 x 10^-12 I dont know how to go about the second portion of this question.

Thanks for taking the time to help me!
Expert's answer
you can find escape velocity as from
v^2/r = GM/r^2

v = sqrt(GM/r)
So for red giant we have
v = sqrt ( 6.67*10^(-11)*1.99*10^(30) / (100*7*10^(8)) ) = 6*10^(4) m/s
For planetary nebula we assume mass to be approximately 1M and radius to be
approximately 10^(15) m. So
v = sqrt(6.67*10^(-11)*1.99*10^(30)/(10^(15) ) = 3.3 * 10^2 m/s

You can see that it is much bigger for red giant

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question