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cw10
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16 Sep 2011, 8:13 am

I think this qualifies under Technology...

[youtube]http://www.youtube.com/watch?v=AfQ3FL0MRXQ[/youtube]

I had to. :)



Fnord
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16 Sep 2011, 8:32 am

^ NOT TO BE TAKEN SERIOUSLY ^

1. "Red Green" was a Canadian comedy show.

2. Perpetual motion is impossible.

3. There are two types of attempts to produce a perpetual motion machines:

a. Perpetual motion machines of the first kind are those devices that attempt to violate the first law of thermodynamics, the principle of conservation of energy, creating energy out of nothing. Most attempts fall into this category.

b. Perpetual motion machines of the second kind are devices that attempt to violate the second law of thermodynamics. Even though they obey the principle of conservation of energy, they attempt extraction of work from a single heat reservoir, violating the principle of no entropy decrease in an isolated macroscopic thermodynamic system.


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Jono
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16 Sep 2011, 8:47 am

Mostly, people who even think about perpetual motion do not understand the principle of conservation of energy. Perpetual motion is impossible.



AstroGeek
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16 Sep 2011, 9:22 am

Too bad he forgot about the input of the luminous energy in sunlight...



cw10
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16 Sep 2011, 5:42 pm

I think the best part of this skit is not so much his "machine" Rube Goldberg device? has so many flaws in it that you can't help but laugh at his comedy, it's the fact that he can't get the engine on the lawnmower started at all. :lol:



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16 Sep 2011, 5:55 pm

I made one the other day, but it bugged me. The damn thing wouldn't stop.


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DC
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16 Sep 2011, 6:00 pm

Jono wrote:
Mostly, people who even think about perpetual motion do not understand the principle of conservation of energy. Perpetual motion is impossible.


Thermodynamics is just an opinion, I'm off to my crystal healing appointment.



Apple_in_my_Eye
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16 Sep 2011, 6:06 pm

DC wrote:
Jono wrote:
Mostly, people who even think about perpetual motion do not understand the principle of conservation of energy. Perpetual motion is impossible.


Thermodynamics is just an opinion, I'm off to my crystal healing appointment.


[youtube]http://www.youtube.com/watch?v=XqcaaUtPdAo[/youtube]

"... as Deepak Chopra taught us, quantum physics means anything can happen at any time for no reason. Also, eat plenty of oatmeal and animals never had a war. Who's the real animals?"



Jono
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16 Sep 2011, 8:42 pm

DC wrote:
Jono wrote:
Mostly, people who even think about perpetual motion do not understand the principle of conservation of energy. Perpetual motion is impossible.


Thermodynamics is just an opinion, I'm off to my crystal healing appointment.


What?! Thermodynamics is not an opinion, it's an empirically verified fact.



Fnord
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16 Sep 2011, 9:03 pm

Jono wrote:
DC wrote:
Jono wrote:
Mostly, people who even think about perpetual motion do not understand the principle of conservation of energy. Perpetual motion is impossible.
Thermodynamics is just an opinion, I'm off to my crystal healing appointment.
What?! Thermodynamics is not an opinion, it's an empirically verified fact.

(Psst ... Jono ... he was joking!)


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ShamelessGit
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17 Sep 2011, 1:59 am

Perpetual motion devices are very common, you just can't get any energy out of them without making them stop. Earth going around the sun is an example.



Burzum
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17 Sep 2011, 2:58 am

Image



ruveyn
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17 Sep 2011, 7:48 am

ShamelessGit wrote:
Perpetual motion devices are very common, you just can't get any energy out of them without making them stop. Earth going around the sun is an example.


There is already a tidal lock between earth and moon. Eventually there will be a tidal lock between earth and sun. Angular momentum is preserved.

ruveyn



ShamelessGit
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18 Sep 2011, 1:54 am

ruveyn wrote:
ShamelessGit wrote:
Perpetual motion devices are very common, you just can't get any energy out of them without making them stop. Earth going around the sun is an example.


There is already a tidal lock between earth and moon. Eventually there will be a tidal lock between earth and sun. Angular momentum is preserved.

ruveyn


That will be quite awful, won't it? Day 24/7 on one side and night 24/7 on the other? But the earth has been spinning for a long time and it doesn't look like its happening very quickly. Will the sun explode before this happens? And in any case that doesn't change the fact that it's a perpetual motion devise (if the sun weren't going to explode and another galaxy weren't going to crash into us after that).



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18 Sep 2011, 9:00 am

perpetual motion is a system that quite literally will go on forever, planetray motion, while at an astronomical scale, does change, does lose energy and will at some point stop moving (heat death of the universe,),


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ruveyn
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18 Sep 2011, 10:30 am

Oodain wrote:
perpetual motion is a system that quite literally will go on forever, planetray motion, while at an astronomical scale, does change, does lose energy and will at some point stop moving (heat death of the universe,),


You mean perpetual motion that can do work. Inertial motion along a geodesic forever is possible in theory, but no work can be derived from this motion.

ruveyn