# Will CO2 absorb photon in all directions?

Discussion in 'Physics & Math' started by Robittybob1, Mar 16, 2012.

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1. ### Robittybob1BannedBanned

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That is true but I was talking about kinetic energy.

http://en.wikipedia.org/wiki/Inelastic_collision

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3. ### BelieveHappy mediumValued Senior Member

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The conservation of energy referres to ALL ENERGY. You need to read the dam webpage before you talk. The transfer of kinetic energy to heat energy IS AN EXAMPLE OF THIS. Kinetic ENERGY is called kinetic ENERGY because it is ENERGY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Either way the conservation of kinetic energy has nothing to do with DIRECTION, only the overall energy present in the system.

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5. ### Robittybob1BannedBanned

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Don't get angry! Kinetic energy will be determined by the conservation of momentum. Momentum has a direction and so does velocity, so KE has plenty to do with direction.

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7. ### BelieveHappy mediumValued Senior Member

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NO, the direction does not matter, it can be ANY DIRECTION and the DIRECTION CAN CHANGED. Only the amount of TOTAL ENERGY is conserved. If you don't believe me throw a ball at the wall or 2 balls at eachother and see it direction is conserved. IT CLEARLY ISN'T. Though the particle IS imparted with kinetic energy in that certain direction as soon as a collision occurs, several of which will happen every second, the DIRECTION WILL BE CHANGED even the thought the TOTAL ENERGY IS CONSERVED. Direction is not a form of energy and is not conserved.

8. ### Robittybob1BannedBanned

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Any sport involving a ball would only be possible if the balls didn't fly off in any direction. There is skill in knowing where the ball will go e.g. golf soccer or football.
OK the ball changes direction but it is far from being random. Direction is changed with elastic collisions. I will admit after a few collisions the direction that individual balls would be going after multiple ball to ball interactions will be hard to predict. But the total initial momentum brought in by the balls is never lost. (Conservation of momentum).
Except that with friction the ball will stop rolling - so you might ask where has the momentum gone in that case? But it will be there in the surroundings.

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Last edited: Apr 16, 2012
9. ### BelieveHappy mediumValued Senior Member

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Friction creates heat, rub your hands together for while. This is where the energy of the rolling ball goes. As you said the direction will be unpredictable and random after a few collisions which will take about a second or less in the air. How could it push the earth in any direction if the direction of the momentum is lost long before it reachs the ground? It will have the same energy yes, but this only makes they molecules in the air zip around faster, but they WILL NOT be going in the same direction for any length of time.

10. ### Robittybob1BannedBanned

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That is how a wind develops. For one or other reason, even though the air molecules are moving in all directions, there is a component that can be called "velocity", and the body moves along.

OK a single photon's momentum contribution might go unnoticed but when there is a source as powerfull as the Sun this can't be ignored.
On Earth the incident light is mostly in the visible spectrum. Once it has passed through the atmosphere and struck the ground, the light energy is changed into heat. The heat is radiated in all directions. So there is no net momentum change in the atmosphere. But where this whole chain of events occurs in the gaseous atmosphere I think the momentum is not lost but is gained by the atmosphere.

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We need to concentrate as to what happens on Venus, for it is different to the Earth situation. But some understanding of what happens on Earth and examples of it won't hurt.

11. ### BelieveHappy mediumValued Senior Member

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CORRECT

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:cheers::xctd:

12. ### Robittybob1BannedBanned

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I'll drink to that as well. :cheers:

13. ### AlexGLike nailing Jello to a treeValued Senior Member

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Are you abandoning your 'Life began on Mercury' nonsense?

14. ### BelieveHappy mediumValued Senior Member

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Off topic an not necessary.

15. ### Robittybob1BannedBanned

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I'll give up when you give it up too!

Mercury has not had a substantial atmosphere for a long time. Early on in its existence it might have had a modest atmosphere allowing for periods of drying and concentration of life forming chemicals. Only once they land a robotic rover that can check out if there still is a trace of life in the frozen poles will we know for sure.

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16. ### Robittybob1BannedBanned

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Did you read Dynamics in Planetary Atmospheric Physics: Comparative Studies of Equatorial Super-rotation for Venus, Titan, and Earth?

techdigest.jhuapl.edu/TD/td2602/Zhu.pdf

OK I could find any references to his mechanism this "Thermal Pumping" but when I have been thinking about it, that paper and my idea are similar,
The Sun powers the atmospheres on these planets to super-rotate (Zoom around the planet much faster than the planet spins itself).

It is only one step further to realise that this mass of atmosphere dragging on the surface of the planet will have a speeding up effect on the planet's rotation.

Did you see this similarity?

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17. ### waitedavid137Registered Senior Member

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Its not speeding up, its slowing down and it has nothing to do with solar radiation.

18. ### Robittybob1BannedBanned

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Now what planet are you talking about?

If the wind is super rotating and prograde there is no option but to effect an acceleration of the planet's spin rate.

Why would you say it is slowing down? There could be other factors slowing it. What are they then?

"Thermal pumping" was to do with solar radiation. Did you disgree with the paper presented "Dynamics in Planetary Atmospheric Physics: Comparative Studies of Equatorial Super-rotation for Venus, Titan, and Earth?

techdigest.jhuapl.edu/TD/td2602/Zhu.pdf"?

19. ### Robittybob1BannedBanned

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What is the story on Titan (one of Saturn's moons.)
http://en.wikipedia.org/wiki/Titan_(moon)

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20. ### Robittybob1BannedBanned

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Super rotator - where the wind moves around the planet faster than the planet spins on its axis. This must in the absence of other factors make the planet spin faster and faster till the forces that drive the super rotation are balanced against other forces.

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22. ### Robittybob1BannedBanned

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A great animation of the Earth's super rotating winds found in the YouTube
"Why Mars Died, and Earth Lived"
http://www.youtube.com/watch?feature=fvwp&v=oC31pqk9sak&NR=1
Uploaded by SpaceRip who on the whole has very informative material.

23. ### PeteIt's not rocket surgeryModerator

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Hi Robbitybob,
This thread is too long, too old, and too woo to be resurrected. If there's something new to discuss, a new thread would be a better idea.

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