Hints to HW7

1. How to find omega of a planet:

Dear Linda:

Yes, perfect answers. You well deserve the 0.5 bonus.

Best regards,    Ling-Lie

----------------At 02:30 PM 2/23/2004 -0800, you wrote:

1.  omega for earth was 2 pi per year
2.  it means that the earth travels a full circle, 2 pi, in one year.
3.  appendix E table E.2 gives the orbital properties of the sun and
planets. 

> Please read my e-mail below to see what is the bonus challenge. Best,  
LL.
> >Date: Sun, 22 Feb 2004 21:08:28 -0800
> >To: "Livia Yan" <lwyan@ucdavis.edu>
> >From: Ling-Lie Chau <chau@physics.ucdavis.edu>
> >Subject: 10B; reply to question on HW 7
> >
> >Dear Livia:
> >
> >Good question, and also good that you have an early start on HW. Let me
> >give you some hints.
> >
> >1. Do you remember what is omega for the earth? It was given in one of
the
> >earlier HWs.
> >2. When you find it, see if you understand it.
> >3. Once you understand it, you will see that you can figure out the
omega
> >of each solar planets from one of the Tables in the Appendix.
> >
> >Please let me know, when you find the answers to the above 3
suggestions.
> >I am also forwarding this e-mail to the class. The first student who
send
> >me the three good answers will get bonus.
> >
> >Best regards,    Ling-Lie
> >
> >At 08:37 PM 2/22/2004 -0800, you wrote:
> >
> >>Hi Dr. Chau,
> >>
> >>Just wondering where we would find the omega values for SA 7.1. I
couldn't
> >>find it in the Appendix.
> >>
> >>Thanks,
> >>Liv

2. Perihelion

We did define and discuss in lecture, using graphs. For further hints, see the following e-mail.


Dear Dao:

You can look up the definition of the Perihelion, and the Perihelion point, by looking up the index of TB1. It has clear diagrams.

Indeed the book seems not to give the detail number for it, only the mean. I checked the web. You can easily find the number by searching for "Perihelion of the Earth."

So, let's be a bit resourceful. This should be our spirit of study and learning.

Please let me know your progress.

Best,   Ling-Lie

At 10:25 PM 2/23/2004 -0800, you wrote:

hi Dr. Chau, i got a question about the homework question SA7.2,  you said
to use the lenght r of the perihelion, i know perihelion means closest to
the sun but i don't know how to find it in the texbook. i'm not sure what
you mean by the perihelion point either. please let me know
thank you,
Dao