What makes the world go round?

Love   1 vote - 33 %
Money   1 vote - 33 %
Conservation of angular momentum   2 votes - 66 %
Invisible pixies   2 votes - 66 %
I reject the heliocentrism implicit in the question   0 votes - 0 %
3 Total Votes
Hey, I know science by Greener (4.00 / 1) #1 Sun Sep 07, 2008 at 11:17:55 AM EST
Not really but I can make stuff up that makes sense. This answers questions 2 and possibly one.
As for number 3 I would image the effect is negligible compared to other heat sources.

While the moon and tidal bulge affect each other the source of the energy itself is from gravity which doesn't get used up like a windmill removes energy from wind. A rock falling to earth is being accelerated by gravity but doesn't remove that amount of energy from the earth's total gravitational pull. From what I understand the source of gravity's energy or force (for lack of better terms) comes from subatomic particles/fields which the LHC is supposed to help us try and identify and understand.

This is all off the top of my head so hopefully a real scientist type can step in and tell me if and where I'm wrong and explain it better than I did.

I suppose a question to ask is by Greener (4.00 / 1) #2 Sun Sep 07, 2008 at 11:25:30 AM EST
if we can develop a device that can harness the force exerted by gravity without it being first transferred through an intermediary object (like water flowing through a dam for example) as kinetic energy would this device be a free energy machine and how much energy would we be able to extract from earth's gravitational field.

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The energy... by ana (4.00 / 1) #3 Sun Sep 07, 2008 at 11:39:21 AM EST
comes out of the orbital kinetic energy of the moon, and the rotational kinetic energy of the earth, which decrease as a result. Most of the energy is wasted, of course (it always is), and that waste heat goes into the environment. Much of it, in this case, is dissipated in turbulent motion of the water around your obstructions, which goes into heating the oceans, ever so slightly.

"And this ... is a piece of Synergy." --Kellnerin

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Also by Herring (4.00 / 1) #4 Sun Sep 07, 2008 at 02:35:07 PM EST
wind turbines are effectively sapping energy from the rotational internia of the earth (coriolis forces, trade winds etc.) but you'd have to put up a lot of them to make a difference. Technically wind, wave and tidal power are non-renewable, but over a very long time.

I suppose that all energy is non-renewable over a long enough timescale.

You can't inspire people with facts
- Small Gods

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Seems to me by herbert (2.00 / 0) #8 Mon Sep 08, 2008 at 12:11:38 AM EST
the main thing is to make sure the Earth is pointing in a good direction when it stops spinning.  If we point the populated parts at the sun, we can save a lot on lighting, so we'll be OK even if there is less wind.

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Actually by ks1178 (4.00 / 1) #11 Mon Sep 08, 2008 at 08:18:46 AM EST
If the earth stopped spinning, the wind would still be there, and possibly become stronger than it currently is.

Warm air on the side facing the sun, would then get out of balance with the colder air on the dark side.

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Sounds like an exam problem by garlic (4.00 / 1) #12 Tue Sep 09, 2008 at 02:38:20 PM EST
If you concieve a tidal energy harvesting system so effective that it prevents the actual ocean tide from happening, what would be the change in the orbit of the moon, and the revolution of the earth?

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Science Answer: by ammoniacal (4.00 / 1) #5 Sun Sep 07, 2008 at 05:36:12 PM EST
I am praying for ALL THREE.

Also, this is the only map anyone really requires for Pride & Prejudice.

"To this day that was the most bullshit caesar salad I have every experienced..." - triggerfinger

It's amazing to think someone made that thing by Clipper Ship (4.00 / 2) #6 Sun Sep 07, 2008 at 06:03:34 PM EST
What is the cat-level required to force into making something like that? 3 cats? 4? Possibly a level-7 cat infestation?

I say 6. And an unholy love of cardigans.


Destroy All Planets

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unholy love of cardigans by ammoniacal (4.00 / 1) #7 Sun Sep 07, 2008 at 07:58:28 PM EST
That's fairly redundant, innit?

"To this day that was the most bullshit caesar salad I have every experienced..." - triggerfinger

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Splendid by herbert (4.00 / 1) #9 Mon Sep 08, 2008 at 12:15:37 AM EST
Although there doesn't seem to be any indication of which way north is, or where the body was found.

Also it looks like a travelling salesman would have a hell of a time visiting all these people.  (humorous nerd joke, pls ignore)

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In the hall by sasquatchan (4.00 / 2) #10 Mon Sep 08, 2008 at 04:05:32 AM EST
with the candlestick by Mr. Green.

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