Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
Im unable to understand where the 9R^2-4R^2 came from on the 3rd line on writing.
![A positively charged insulating cylinder (shown in yellow in Figure 3) with radius R has uniform volume charge
density p0. The cylinder is placed at the centre of a negatively-charged insulating cylinder (shown in grey) with
inner radius 2R, outer radius 3R, and volume charge density – p0/2.
a) Use Gauss' Law to find the electric field E outside the cylinders at r> 3R. Express your answer in terms of the
parameters defined in the problem.
b) What is the electric potential on the surface at r= 3R, considering V= 0 at o.
2R
3R
R](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F88ff2fde-4adf-494c-9402-c1025377df64%2F25b04013-2c38-4029-ae12-b0b92009a9f3%2Fgyesxem_processed.png&w=3840&q=75)
![93R
→2R
2.
OAccording to Gauss lan : f E.do = Reuc
%3D
Eo
Here Gaussian Berface is a
cylendor wth radius r73R
to
%3D
2.
Ea 玉 R'g。
4
E. 2Rr =
%3D
2.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F88ff2fde-4adf-494c-9402-c1025377df64%2F25b04013-2c38-4029-ae12-b0b92009a9f3%2F6je5uc5_processed.png&w=3840&q=75)
![](/static/compass_v2/shared-icons/check-mark.png)
Step by step
Solved in 3 steps with 3 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
![College Physics](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![University Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Introduction To Quantum Mechanics](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![College Physics](https://www.bartleby.com/isbn_cover_images/9781305952300/9781305952300_smallCoverImage.gif)
![University Physics (14th Edition)](https://www.bartleby.com/isbn_cover_images/9780133969290/9780133969290_smallCoverImage.gif)
![Introduction To Quantum Mechanics](https://www.bartleby.com/isbn_cover_images/9781107189638/9781107189638_smallCoverImage.jpg)
![Physics for Scientists and Engineers](https://www.bartleby.com/isbn_cover_images/9781337553278/9781337553278_smallCoverImage.gif)
![Lecture- Tutorials for Introductory Astronomy](https://www.bartleby.com/isbn_cover_images/9780321820464/9780321820464_smallCoverImage.gif)
![College Physics: A Strategic Approach (4th Editio…](https://www.bartleby.com/isbn_cover_images/9780134609034/9780134609034_smallCoverImage.gif)