help with math ( for smart People only)
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Elder User
Joined: Oct 2001
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From: virginia beach
help with math ( for smart People only)
Ok, I am so lost here is the problem. If anyone knows of a message board that is just math problems like this, it would be great help. Please help me if you can.
Problem 1....Given That:
* the distance from the earth to the sun is 1.5 x 10^11 m, and
* the mass of the sun is 1.9 x 10^30 kg.
1. Use keplers Law of Peroids to find the period of the earth's orbit, recorded in seconds;
2. show to to express your answers in years; and
3. if your answer does not agree with the accepted earth orbital period of 365.25 days, explain the discrepancy.
Problem 2....
According to Newtons Law of Gravitation, all objects with mass attract one another. This law implies that all of the atoms that make up a star, such as our sun, are gravitationally attracted to one another. If so, how is it that the sun is able to resist all of this internal attraction between its atoms and not collapse in upon itself.
...
Devise and execute a problem solving strategy that will yield a reasonable physical explanation for how a star is able to resist collapsing under its own gravitational attraction.
Thanks, if there is help with this post I will most likely post 2 more threads. Thanks alot.
Problem 1....Given That:
* the distance from the earth to the sun is 1.5 x 10^11 m, and
* the mass of the sun is 1.9 x 10^30 kg.
1. Use keplers Law of Peroids to find the period of the earth's orbit, recorded in seconds;
2. show to to express your answers in years; and
3. if your answer does not agree with the accepted earth orbital period of 365.25 days, explain the discrepancy.
Problem 2....
According to Newtons Law of Gravitation, all objects with mass attract one another. This law implies that all of the atoms that make up a star, such as our sun, are gravitationally attracted to one another. If so, how is it that the sun is able to resist all of this internal attraction between its atoms and not collapse in upon itself.
...
Devise and execute a problem solving strategy that will yield a reasonable physical explanation for how a star is able to resist collapsing under its own gravitational attraction.
Thanks, if there is help with this post I will most likely post 2 more threads. Thanks alot.
Postmaster
Joined: Mar 2003
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From: La Tech University, La
Um....problem #1 what is the speed of the earths rotation around the sun? I mean, that is needed n order to figure the prob correct?
prob 2 I cannot help.....I am guessing you are in College?
prob 2 I cannot help.....I am guessing you are in College?
New User
Joined: Oct 2003
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Just a guess, but for problem 2 you can use anything as an example, the reason that things don't collapse in on themselves is the fact that all of the particles are pulling at the same time untill they get to a distance that the opposing forces are at a stalemate, size should not affect that. Why doesn't the moon come crashing into the earth?
Kepler's law states T^2=((4pi^2)/GM)a^3
The chart with it sets earth at T=1 in years
I assume GM is gravitational mass and a=?
you can find a web site through a search engine and Kepler's law of periods.
Sorry I won't be getting into this stuff for a while.
Kepler's law states T^2=((4pi^2)/GM)a^3
The chart with it sets earth at T=1 in years
I assume GM is gravitational mass and a=?
you can find a web site through a search engine and Kepler's law of periods.
Sorry I won't be getting into this stuff for a while.
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From: Kansas City, MO.
The photophere of the sun is liquid, Thus it can't collapse on itself. The sun has a total density of 1.4 g/cm3, the density of water is 1 g/cm3. Read up on Thompson, Bohr, Carnot, Kirchhoff, Gibbs, Claussius, Wein Stephan, Langley and Eddington. They were all pioneers in Thermalphysics. Working on the other question....