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/sci/ - Science & Math


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File: 26 KB, 500x375, 254920_10150137005229229_523769228_5957289_7256749_n.jpg [View same] [iqdb] [saucenao] [google]
3151703 No.3151703 [Reply] [Original]

Now that I have your attention:

I want to now if I can use energy in any form to "suck" away heat.

I can think of a couple of ways, but I need more to substantiate my ideas, all just to impress a cute physics-major girl. Please help me.

I will leave this question as general as that, and please be descriptive so I may better explain to her

>> No.3151707

that's how a refrigerator works you dumb fuck

>> No.3151712

>>3151707

Go on...

>> No.3151721

Bump

>> No.3151729
File: 321 KB, 600x427, 1266178637552.png [View same] [iqdb] [saucenao] [google]
3151729

Please?

>> No.3151730

Google it, you retard.

>mfw You're trying to use someone else's knowledge to make yourself look better and claim you came up with it

>> No.3151731

second law of thermodynamics

you're pathetic

>> No.3151733

>>3151712
look the fucker up

>> No.3151740
File: 14 KB, 301x341, 3.jpg [View same] [iqdb] [saucenao] [google]
3151740

>impress girls
>not with charm
>or humour
>or by showing them fun times
>but by explaining to her how a refrigerator works

never change /sci/

>> No.3151741

>>3151730

I never said I'd do that, but I do want to appear to understand something that I don't fully understand, even though if I'm explained well, I will understand.

>> No.3151744

>>3151712
It's called a heat pump. It's very boring, but can double as a heater with more than 100% efficiency. Look the rest up yourself.

>> No.3151748
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3151748

you are SO gay.

>> No.3151756

>>3151703
learn to thermodynamics
The physics major is no better than you are, apparentely.

>> No.3151758

>>3151748

Well done! Now, maybe you can come over to my house and point out things that are cheap.

>> No.3151761

It's a fairly simple application of the second law of thermodynamics, and the fact that gas cools on expansion.

Using Freon gas (a CFC) inside tubes (for old refrigerators) in liquid form, as it spreads throughout the tubes inside the fridge it evaporates into gas which pulls heat out of the air on the inside to provide the energy for the phase change.

The pump in the back then sucks the gas back through a smaller tube, compressing and re-liquefying it outside the back of the fridge, with all the heat from this process let off into the air outside the fridge. Which is why the back of a running fridge gives off heat.

Lather rise repeat. The "power" is used to drive the pumps.

>> No.3151764

>>3151756

I'm sure she is, but I don't want to ask her, I want to understand it before she needs to explain it to me.

I just don't want to look like more of an idiot.

>> No.3151772

>>3151761

Thanks H+

>> No.3151774

If you feel like making something besides a plain refrigerator, look up all the different DIY chillers (Fish hobbyists are best for this) or heatsinks and whatever fancy cooling systems the tech hobbyists will come up with (these will probably have the best aesthetics, but usually focus more on just dissipating heat to a manageable level than 'producing cold'.)

>> No.3151775

>>3151764

In this case it's really a combination of physics and chemistry. It's because changing solid-liquid-gas phases are very energy intensive, wither exothermically or endothermically, that this kind of heat transfer works.

The second law of thermodynamics is basically "Temperate tends to even out uniformly in a closed system"

>> No.3151778

>>3151772

Not a problem.

>> No.3151784

>Implying that physics major doesn't know how refrigerators work
>Implying that you are not 15

Also to help you out:
http://en.wikipedia.org/wiki/Refrigeration

>> No.3151783

>>3151764

If she's anything like me, she enjoys talking about science. She likes explaining those things. And she doesn't talk down to people who don't know, she only thinks people who refuse to learn are stupid.

You're getting worked up over nothing and you'll end up looking like a tryhard.

>> No.3151786

>>3151783

Thanks, Dr. Phil!

>> No.3151792

>>3151784

I'm seventeen, and this is only my second year of college. She is one year older, but it's sher second year, too.

>> No.3151795
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3151795

>>3151792

>>17

>> Second year of college

... What?

>> No.3151801

>>3151795

Damn straight!

>> No.3151805

>I have seen such a thing as an object which was frigid. It induced a marvelous strange sensation when pressed against the skin. However, on exposure to torridity, it rapidly defrigerated.

>Is there any conceivable instrumentality by which an item thus and so might be RE-frigerated? I assure you, expenditure of physio-kinetical work is no object to my designs.

>> No.3151808

>>3151801
But you don't know how a common fridge works?

>> No.3151818

>>3151808

I think he was referring more to my attached image.

>>3151801

The question there was "What? Where I'm from you don't normally graduate High School until age 17, how are you already in your second year of college?"

>> No.3151837

Cooling shit with sound.
Thermoacoustic refrigerator

>> No.3151849

Er... how about using a fan like everyone else?

>> No.3151860

You can cool things with a laser (optical tweezers), depending on your definition of temperature.

>> No.3151862

>>3151775
chemistry is barely physics and geometry.
>>3151849
Because a fan only tends to accelerate the natural tendency of homogenisation, whereas a fridge or a heat pump go against that tendency.

>> No.3151870
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3151870

>>3151862

Chemistry is applied physics just like biology is applied chemistry.

>> No.3151872

>>3151818
His country probably only has a 10 year school system (or whatever they call it), as opposed to the American standard of 12 years. That means he's out of High school by 16. At least that's what's up here in the Philippines.

>> No.3151880

Trying to impress a physics-major by learning a trivial piece of physics. This is a fucking moronic idea.

>> No.3151881

>>3151870
that's what I said, thanks for repeating.

>> No.3151889

>>3151870
Except that this is, of course, only a little joke.

While it should be theoretically possible to derive chemistry from physics, we're just that not good at physics.

>> No.3151894

>>3151889

True.

>> No.3151961

>>3151889
Well then physicists just have to get better.

>> No.3152555

>>3151880 Trying to impress a physics-major by learning a trivial piece of physics. This is a fucking moronic idea.

This is the truth.

Explaining to her, badly, how a fridge works isn't going to get her wet.

Getting her to explain something to you, telling her she's interesting and makes for a sexy teacher will have you pounding her for a full 3 seconds before you cum and cry.

Enjoy your fail.

>> No.3152619

>>3151872
Are there other countries who lets the kids out of highschool before 17?