To add comments or start new threads please go to the full version of: Where Does Life Get Its Energy From?
PhysForum Science, Physics and Technology Discussion Forums > General Sci-Tech Discussions > Puzzling questions

magpies
The energy to go up a hill the energy to turn around the energy to jump and swim. Where does life get its energy from? Of course the obv answer is from eating food and breathing and drinking... While yes thouse do seem to be where life gets its energy from doesn't it seem more is needed for life to be able to exist? How could thinking arise from simply eating drinking and breathing?

Anyhow its a thought iv had a couple times recently and I just wanted to start a thread on it. I have my own thoughts about where the energy for life to do the things that seem to defi logic. Like jumping off the earth if only for a few seconds and only a few inchs. To have the ability to think of it is amazing but to also actualy have the energy to pull it off seems twice as amazing. If you really think about it rocks should not be able to walk yet here we are walking rocks. Oh well guess its one of the many things we will have to debate forever...
pronnor
Hi!

i think its from the fact that energy is perpetual and so it ends up intertwined in molecules which are then reacted with other molecules and so energy is transferred. Apparantly this is known as the tendancy called Entorpy, but what will happened if all the entropy runs out? This nobody knows yet.
magpies
So entropy creates perpetual energy then? That could help to explain it but how does that factor in with the ability to make choices that seem illogical or at least arn't the normal way physics would work. Like when a life form makes the choice to go some place else? Also why would entropy run out? Is entropy made out of something?
AlphaNumeric
QUOTE (magpies+Aug 13 2009, 09:16 AM)
How could thinking arise from simply eating drinking and breathing?

Thinking is an emergent property of the electrochemical reactions within our brains, which requires energy, to grow, maintain and operate the neurons and their synaptic connections.

Without energy there'd be no way for electrochemical messages to be activated, we'd be unable to think (or to live at all).
buttershug
It comes from chemical engery.

If you want to understand you will first have to understand what "energy" is.

And why a fat person is technically has a lot of engery.

And also look up Kreb's cycle.
Empress Palpatine
QUOTE (buttershug+Aug 13 2009, 06:49 AM)


And why a fat person is technically has a lot of engery.


laugh.gif

I am sure all the fat people would love to know how to tap into all this energy!

In the movie the Matrix, they said that we are batteries. Is there some truth to this? I guess we'd have to be rechargeable batteries.
MjolnirPants
QUOTE (Empress Palpatine+Aug 13 2009, 12:20 PM)
In the movie the Matrix, they said that we are batteries. Is there some truth to this? I guess we'd have to be rechargeable batteries.

The human body produces heat and a small electrical current. It's not really feasible, though. To harness the electrical current would mean intercepting it before it reaches it's source, and since the vast majority of that current consists of the firing of synapses in the brain, that would mean the person being used in this manner would barely be conscious, and thus unable to participate in the virtual reality of the matrix.

Of course, one could limit the electrical energy harnessed to that which is used to trigger muscle movement, but that wouldn't be very efficient, given that the person must sleep and sit still quite often in the simulation.

The heat from the body is a more viable source of energy, but it's still not much. Certainly not enough to steam water, so you'd need a thermovoltaic material encasing the body to harness it, which would mean that the person would quickly die of hypothermia.
Empress Palpatine
I guess, then, we don't have to worry about an evil genius stealing our personal juice. ohmy.gif

Are people AC or DC? (our electricity in our brains)

If we are "batteries", I assume DC, but then I am not sure.
light in the tunnel
QUOTE (magpies+Aug 13 2009, 08:16 AM)
The energy to go up a hill the energy to turn around the energy to jump and swim. Where does life get its energy from? Of course the obv answer is from eating food and breathing and drinking... While yes thouse do seem to be where life gets its energy from doesn't it seem more is needed for life to be able to exist? How could thinking arise from simply eating drinking and breathing?

Anyhow its a thought iv had a couple times recently and I just wanted to start a thread on it. I have my own thoughts about where the energy for life to do the things that seem to defi logic. Like jumping off the earth if only for a few seconds and only a few inchs. To have the ability to think of it is amazing but to also actualy have the energy to pull it off seems twice as amazing. If you really think about it rocks should not be able to walk yet here we are walking rocks. Oh well guess its one of the many things we will have to debate forever...

I don't know if you're going to be happy with me bringing the bible into this discussion, but it is relevant to this and I'm not doing it to push the bible on people - just consider it an interesting parallel from a philosophical theory.

The book of Genesis talks about the creation of light as a major project of divinity. Plants "reach" for sunlight as they grow, and humans also "reach for light" metaphorically with their minds and spirits. Interestingly the metaphor of light in mind and spiritual terms corresponds with aspects of physical light, such as the concepts of "openness," "truth," "directness," etc. are similar to an open structure where more sunlight can get in to illuminate, or discovering truth feeling as if one was in a dark room where a light goes on and one is able to see things as they are instead of having to feel around and guess, or directness of communication where one tries to express something in the clearest way possible, with the intent of being understood and "opening up" ones ideas for discussion.

So the fact that sunlight is the fuel that plants use to grow and feed other life is not that different from the idea that light provides food for thought and spiritual growth. Granted thought and spiritual energy are a different kind of energy from solar power and the hydrocarbon-combustion of digestive systems, but the parallel is not crazy and it's neat that someone wrote about so many years ago as the book of Genesis was written.
flyingbuttressman
QUOTE (light in the tunnel+Aug 13 2009, 06:05 PM)
I don't know if you're going to be happy with me bringing the bible into this discussion, but it is relevant to this and I'm not doing it to push the bible on people - just consider it an interesting parallel from a philosophical theory.

Oh god why?

QUOTE
The book of Genesis talks about the creation of light as a major project of divinity.  Plants "reach" for sunlight as they grow, and humans also "reach for light" metaphorically with their minds and spirits.  Interestingly the metaphor of light in mind and spiritual terms corresponds with aspects of physical light, such as the concepts of "openness," "truth," "directness," etc. are similar to an open structure where more sunlight can get in to illuminate, or discovering truth feeling as if one was in a dark room where a light goes on and one is able to see things as they are instead of having to feel around and guess, or directness of communication where one tries to express something in the clearest way possible, with the intent of being understood and "opening up" ones ideas for discussion.

I hope that someday you will realize how ridiculous this statement is. Of course you ignore the ACTUAL reasons why things happen and instead offer the explanation: "God made plants grow upward so that he could make an obscure reference in a book that he 'inspired' a bunch of wandering shepherds to write so that foolish Christians 2500 years later would notice it and try to convert atheists with it." Wow, good job.

QUOTE (->
QUOTE
The book of Genesis talks about the creation of light as a major project of divinity.  Plants "reach" for sunlight as they grow, and humans also "reach for light" metaphorically with their minds and spirits.  Interestingly the metaphor of light in mind and spiritual terms corresponds with aspects of physical light, such as the concepts of "openness," "truth," "directness," etc. are similar to an open structure where more sunlight can get in to illuminate, or discovering truth feeling as if one was in a dark room where a light goes on and one is able to see things as they are instead of having to feel around and guess, or directness of communication where one tries to express something in the clearest way possible, with the intent of being understood and "opening up" ones ideas for discussion.

I hope that someday you will realize how ridiculous this statement is. Of course you ignore the ACTUAL reasons why things happen and instead offer the explanation: "God made plants grow upward so that he could make an obscure reference in a book that he 'inspired' a bunch of wandering shepherds to write so that foolish Christians 2500 years later would notice it and try to convert atheists with it." Wow, good job.

So the fact that sunlight is the fuel that plants use to grow and feed other life is not that different from the idea that light provides food for thought and spiritual growth.  Granted thought and spiritual energy are a different kind of energy from solar power and the hydrocarbon-combustion of digestive systems, but the parallel is not crazy and it's neat that someone wrote about so many years ago as the book of Genesis was written.

UGLUK, GREEN PLANTS NO GROW IN CAVE. GREEN PLANTS GROW IN SUN ONLY.
GREEN PLANT MUST LIKE SUN. GREEN PLANT MUST NEED SUN. GREEN PLANT MUST GROW UP TOWARD SUN! ME SMART YOU DUMB!!

There's some divine inspiration for you.
flyingbuttressman
From PM: (you've really got to stop this idiotic habit)
QUOTE (light in the tunnel+)
I did not say that plants grow toward sunlight because God or gods tell them to. I said that the parallel between actual light and metaphorical "spiritual" light is interesting. And I said it was interesting that someone wrote about it in an ancient text like the book of genesis. You are so bent on putting down religion that you seem unable to appreciate it for what it is, nothing more nothing less.

Picking a fight with religion isn't hard. It's actually hard to avoid if you are anything short of totally blind.

Tell me, where in the Bible does it say that it is bad to commit genocide? Joshua didn't seem to have any problem committing genocide. In fact, from the description that has to be one of the worst examples of genocide in history. The Israelites invaded Canaan and killed everyone they could find; men, women and children. God punished them when the DIDN'T kill every single human being. The one city that saved itself by tricking Joshua into an alliance ended up being treated as 2nd class citizens. Tell me that's not horrible. Don't forget, God told them to do it.
PhysOrg scientific forums are totally dedicated to science, physics, and technology. Besides topical forums such as nanotechnology, quantum physics, silicon and III-V technology, applied physics, materials, space and others, you can also join our news and publications discussions. We also provide an off-topic forum category. If you need specific help on a scientific problem or have a question related to physics or technology, visit the PhysOrg Forums. Here you’ll find experts from various fields online every day.
To quit out of "lo-fi" mode and return to the regular forums, please click here.