Basic Understanding of Physics Questions

[Anonymous No.3595087]

If you leave a refrigerator open in the middle of a room and let it run, will the room become colder, hotter, or stay the same temperature?

[Anonymous No.3595102]

Conservation of energy. duh

[Anonymous No.3595104]

Hotter.

[Anonymous No.3595105]

Your room will smell like shit from all the food going bad in the fridge because your dumb ass decided to leave the fucking door open.

[Anomynous No.3595111]

power entering room to run refrigerator compressor -> hotter

[Anonymous No.3595123]

hotter. this is a consequence of the 2nd law of thermodynamics. and would probably make a humorous comic... 2 hippies trying to open a fridge to cool a room down... not realizing certain thermodynamic limits.

chemE student, so you know i'm right ;)

[Anonymous No.3595121]

refrigerator only gets cold because it shoves heat out the back. In a room, that heat just recirculates. Incoming energy powering the refrigerator adds energy to the system and very slowly warms the room.

[Anonymous No.3595131]

Wow. You niggers are retarded.

The room will get colder. The fridge will chill the air slowly, but surely.

[Scientist !!ThFjnJh4EkH No.3595136]

>>3595131
Protip: Fridges make heat from the engine, and the cooling effect is merely moving heat elsewhere.

Movement of energy has zero net change on temperature. The friction et al from the motor increases the temperature in the room.

[Anonymous No.3595140]

>>3595131

[MusicPiggy !!iMBB9yBnJYG No.3595143]

>>3595131
Feel behind your fridge. The air coming out is warm. Why? Because turning a hot thing into a cold thing means reversing entropy. This is impossible, so we must increase entropy elsewhere. Your fridge is already making your room hotter, it'll just do it more slowly if you open the door.

[Anonymous No.3595144]

>>3595131
this makes more sense.

[Anonymous No.3595150]

>>3595140
>>3595136
>>3595143

By your guys' logic air conditioning is impossible.

Sure is 11th century science in here...

[Anonymous No.3595154]

>>3595136
>>3595140
>>3595143
>>3595144
I didn't post that, but really guys, getting trolled to this?
I would have said 1/10 for effort, but since it worked so well I'll give him a 4/10

>>3595150
Nice persistence though.
5/10, 6/10 if someone replies

[Anonymous No.3595158]

>>3595144
and you're the same guy, just trying to stick up for yourself. If you're not, you're a different kind of special. When the correct answer has been explained so many times in the thread, the people still arguing are either not going to be convinced by anything or are trolls just trying to get a rise.

[Anonymous No.3595156]

>>3595131

[MusicPiggy !!iMBB9yBnJYG No.3595165]

>>3595150
Feel your air conditioner. It is making a shit load of heat. You know why? Because it takes heat to remove heat. In fact, it is impossible to break even with this heat transfer. The heat made by your air conditioner is always more than the heat removed from your house.

[Anonymous No.3595171]

>>3595158
well i was thinking the cold air comes out the front of an open fridge.

the hot air comes out the back.

so if the air remains still (which is a mathamatical thing for an amount of time) then cooling will happen in a certain part of the room.

my mind is thinking 1000 levels beyond yours. temperature gradients etc...

[Anonymous No.3595172]

I must be getting group trolled or something...

The question was:

>If you leave a refrigerator open in the middle of a room and let it run, will the room become colder, hotter, or stay the same temperature?

the answer is colder because fucking refrigerants cool shit down, and the room is not a closed system...

Seriously what the fuck guys...

[Anonymous No.3595176]

Do you people even have fridges?
>>3595131
This is the only person who has it right.
When you put something in, it gets COLDER
If you leave the door open, it will just make the whole room cold

[Anonymous No.3595177]

>>3595172
If you leave a refrigerator open in the middle of a [closed system] and let it run, will the room become colder, hotter, or stay the same temperature?

[Anonymous No.3595182]

>>3595171
how long does the cold air last once you open the fridge door? Not very long, it disperses in the room. From then on your fridge is trying to cool the entire room. It does this by taking all the heat it can and shoving it out the back, which just ends up back in the room. The energy it takes to do this adds a bit to the system, increasing the overall temperature of the room. No cooling occurs in the system, even in front of the fridge.

[Anonymous No.3595183]

>>3595171
Thinking 1000 levels beyond someone else? You play Catherine?

[Anonymous No.3595187]

>>3595176
if you leave the door shut

[Anonymous No.3595192]

this thread:
>simple question asked
>several /sci/tards give the right answer
>a troll calls everyone who gave the right answer retarded
>everyone who gave the right answer gets buttfurious
>mass arguments ensue
>troll wins again
/sci/, i like you and all, but you need to learn to ignore obvious trolls.

[Anonymous No.3595191]

>>3595182

No nigger, because you are being fed energy from the energy company and the rate at which you're cooling is faster than the rate at which shit is being heated.

[Anonymous No.3595201]

>>3595183
Oh you

[Anonymous No.3595204]

i learned something new today thanks /sci/

[Anonymous No.3595209]

>>3595192

Except I'm not trolling and they are legitimately wrong...

The job of your refrigerator is to cool, it is apodictically true that it does this in a small level. The door insulates the area so that it doesn't waste energy cooling your entire house. Remove the insulator and the cooling effect spreads.

I'm seriously not fucking trolling, I don't see how /sci/ doesn't see this.

[Anonymous No.3595215]

>>3595209
>First rule of trolling. Don't admit to trolling.

Well played.

[Anonymous No.3595217]

>>3595209
NO U

[Scientist !!ThFjnJh4EkH No.3595224]

>>3595209
>I'm seriously not fucking trolling, I don't see how /sci/ doesn't see this.
I suggest you learn how a refrigerator functions. You do not get a Maxwellian Demon. You cannot lower entropy on large scale (probabilistically speaking). The best you can do is move the heat somewhere else. That's what refrigerators do. They have a compressor and shit, which allows them to move heat from inside the insulated fridge to outside the insulated fridge. You neither gain nor lose heat. That law of thermodynamics, you know.

That is until friction comes and bites your ass, actually producing net positive heat. The other law of thermodynamics, you know.

[Anonymous No.3595237]

>>3595215
>>3595217

You can't be serious... well at least explain to me how you think I'm wrong so I can see the flaw in my thinking, or point out the flaw in yours.

If anything just writing me off as a troll with no explanation is more troll like than I am being...


>>3595224

I understand what you're saying, but I think that you are thinking of the room, fallaciously I might add, as a closed system. My argument is that the heat produced by the process would essentially dissipate through the walls and the heat would be moved outside of the house entirely making THE ROOM cooler, as per OP's question. Laws of thermodynamic's still fine, entropy still cool (pun partly intended). So, could you explain to me how that is wrong?

[Anonymous No.3595238]

so if there is a gain in heat in everything we do...
does that mean eventually, the world will just overheat

[Anonymous No.3595248]

>>3595224
>getting trolled

[Scientist !!ThFjnJh4EkH No.3595250]

>>3595237
>I understand what you're saying, but I think that you are thinking of the room, fallaciously I might add, as a closed system. My argument is that the heat produced by the process would essentially dissipate through the walls and the heat would be moved outside of the house entirely making THE ROOM cooler, as per OP's question. Laws of thermodynamic's still fine, entropy still cool (pun partly intended). So, could you explain to me how that is wrong?

That is a disingenuous answer to the OP's question.

Also, to go into this tangent, I would hazard a guess that unless your fridge is flush with the wall, and the fridge is designed with a heat sink that can be made flush with the wall, that you're not going to have sufficient heat loss through the wall compared to the "coolness" from the open fridge door to result in a lower temperature.

[Anonymous No.3595251]

>>3595237

You've already had a bunch of explanations. Fridges just move heat away, they don't destroy it.

[Anonymous No.3595255]

>>3595224
Wtf is wrong with you? He's clearly a troll. Several poster's have already pointed it out. His posts make it obvious.

But he says "I'm not a troll" and somehow you think "well, golly gee, he said he isn't, why would he lie?" and then proceed to get trolled hard.

aspie much?

[Anonymous No.3595263]

>>3595250

>That is a disingenuous answer to the OP's question.

How is that disingenuous? Answering the question correctly is disingenuous?

>Also, to go into this tangent, I would hazard a guess that unless your fridge is flush with the wall, and the fridge is designed with a heat sink that can be made flush with the wall, that you're not going to have sufficient heat loss through the wall compared to the "coolness" from the open fridge door to result in a lower temperature.

I never said it would be rational or energy efficient, I'm just saying, given a long enough period of time, and assuming you pay your electric bill the fridge will eventually cause a net temperature decrease and the cause of that will be the fridge.

[Anonymous No.3595266]

>>3595251

I know faggot.

[Anonymous No.3595272]

Okay.

Okay.

So what would happen if you used a refrigerator in space? Can vacuum get colder?

Also, what if you had a really huge and really powerful fridge, and put the sun in it. Would the sun die?

[Anonymous No.3595274]

WHAT IF THE ROOM HAS A DOOR THAT IS OPEN AND THE BACK OF THE FRIDGE IS TOWARDS THE DOOR

WHAT NOW BITCHES WHAT NOW


also the captcah has my name holy shit

[MusicPiggy !!iMBB9yBnJYG No.3595279]

>>3595238
There isn't a heat gain in everything we do, there's an entropy gain. Those two things often coincide because of friction, but basically, the more we do things, the less things we can do. So eventually, the universe will have done so many things that it can't do anything anymore.

[Scientist !!ThFjnJh4EkH No.3595290]

>>3595263
It's disingenuous because the intended answer is to elucidate physics, not to find a loophole in a contrived scenario where you get an obscure answer.

I do not understand your second point. Let's suppose we have a room at thermal equilibrium with the outside world. Not a closed system. We would need empirical data to truly answer this rather complex modeling problem. I again hazard the guess that you would have a net heat increase in the room.

[Anonymous No.3595303]

>>3595272
and what if you had a water pump that pumped fruit and instead of a heat sink it was goats but then you put nutella in it so it could sear faster and then you reversed the polarity of the tachyon beam?

Would the average absolute temperature of the universe increase or decrease?

[Anonymous No.3595305]

>>3595279

But entropy works statistically. Not everything creates entropy.

[Anonymous No.3595307]

>>3595305
Anything on the Macro-scale is a statistical result.

[MusicPiggy !!iMBB9yBnJYG No.3595312]

>>3595305
Everything creates entropy because entropy works statistically. I don't see what you're trying to say. Everything creates entropy because it is a statistical impossibility for anything reduce entropy.

[Anonymous No.3595322]

>>3595312
Locally different reactions can reduce entropy spontaneously.

[Anonymous No.3595320]

>>3595312

what about the universe expanding?

[Anonymous No.3595319]

>>3595290

Eh, I don't really care anymore. I think the problem comes in when you deal with the ambiguity of the room as a parameter for testing temperature difference. Basically my thinking comes from the fact that you stand in front of the fridge and it is cold so the limits of where you would define the boundary of when "a room" is colder is too ambiguous to answer properly. I'm glad to know /sci/ is prejudiced against hearing opposing viewpoints though. Thanks Scientist for being a bit more rational.

[Anonymous No.3595328]

>>3595319
>Holier-than-thou
>Cya bitches

[Anonymous No.3595340]

>>3595290
>I again hazard the guess
>hazard the guess

Tell me, are you always this contrivedly sesquipedalian, or do you only honor us with your nonsensical pseudo-intellectual circumlocutions?

As for the case under consideration, if the walls in the room were uniform then the area behind the fridge through which the heat is flowing out of the room would be much less than the rest of the area where heat is flowing in.

If the walls are not uniform then your system begins to resemble >>3595274

[Anonymous No.3595345]

>mfw I read about how refrigerators work
I always thought they used some sort of chemical reaction. It's possible to make a refrigerator that uses chemical reactions to absorb heat and actually cool down the room, right?

[MusicPiggy !!iMBB9yBnJYG No.3595346]

>>3595322
>locally
Spontaneous reductions in entropy only happen if there is heat advantage to the reaction. Entropy still increases on a macro scale because free enthalpy decreases. It's a safe thing to say that everything creates entropy.
>>3595320
What about it? The fact that the universe is expanding only means that we're running out of things to do even faster than we would be.

[Scientist !!ThFjnJh4EkH No.3595348]

>>3595340
I put in weasel words specifically because I do not know offhand. I haven't taken enough engineering courses where we actually modeled anything like this to know. I'm shooting from the cuff here, and I'm making that explicit.

[Scientist !!ThFjnJh4EkH No.3595351]

>>3595345
Actually, I suppose so. Highly inefficient, and of course you would have a very finite amount of cooling, as oppose to modern methods which can work for years.

[Anonymous No.3595364]

>>3595345
There are endothermic chemical reaction, yes. They can make things extremely cold, extremely fast. Refueling your fridge would be a pain.

[Anonymous No.3595368]

If it makes the room hotter, how do they have giant freezer rooms you can walk in?

[Anonymous No.3595376]

The question asks whether the ROOM will get colder. Which it will, the room will get cooler but the fridge itself will overheat.

[Anonymous No.3595373]

>>3595368

i dunno, i think its because freezers are stronger than fridges and thus able to reverse entropy

[Anonymous No.3595382]

if the 2nd law of thermodynamics is true, then why do people get shivers down their backs when they're scared?

chrisitans 0 , athiests 0, friendship 1

[Anonymous No.3595388]

>>3595376

Thank you. That's what I've been trying to say all along.

[Science !!V9NwDn3l+KQ No.3595399]

>>3595087
It'll get hotter. No free lunch.

[Anonymous No.3595400]

>>3595376
Fridges vent heat out the back of the fridge and into the room.

[Anonymous No.3595402]

>>3595348
I wasn't remarking on your use of weasel words, but rather on your use of expressions that are themselves nigh nonsensical. It seems as though you're making an effort to sound intellectual and it's coming across as effected. I highlighted "hazard the guess" because "guess" itself already implies uncertainty, thus the addition of "hazard" is just silly, but it increases verbosity for effect.

I'm not saying that you're not intelligent. Despite the fact that you're on a manifest ego-trip, you seem to know your shit. It's just a bit sad that you feel the need to project some bullshit image of yourself through unnatural speech.

Maybe you're just tired, but from what I've seen you're coming across as pretentious.

[Science !!V9NwDn3l+KQ No.3595405]

>>3595368
Its because the 'hot' parts of the freezer are on the outside.

[C No.3595411]

>>3595307
Do you enjoy sucking on your professor's balls?

[Science !!V9NwDn3l+KQ No.3595410]

>>3595376
No, it won't. Even if a freezer or fridge could equal the amount of enegry reduced inside as the amount of energy increased outside, the room wouldn't get cooler.

But fridges and freezers are inefficient, so the heat created would not be offset by the cool air.

no free lunch.

[Scientist !!ThFjnJh4EkH No.3595413]

>>3595402
Maybe I am pretentious. Dunno.

[Anonymous No.3595419]

>>3595402
I've noticed nearly subconscious unnatural speech has come to me when explaining things before. I usually catch my self to sound less pretentious.

[Anonymous No.3595420]

>>3595340
Asperger's or arrogant?

[Anonymous No.3595430]

>>3595420

That's racist! Why can't he be both?

[Anonymous No.3595462]

>>3595419
I'm not saying that someone should dumb down the way that they speak just to sound more natural. I'm just saying that it's silly when someone starts formulating sentences that don't mean anything or that are completely redundant. It's like saying "hey, let me use some big words even though I don't know what they really mean... I'll sound smart and no one else will notice that it didn't actually make sense".

Say what you want to say. Say it eloquently if you can. Simplify it if your audience requires. But don't randomly sprinkle words on everything hoping that some of them will fit.

[Anonymous No.3595474]

>>3595462
The thing is, speech is usually come up with seconds before being spoken, or even less. Sometimes absurdities or redundancies just roll out. I understand that in a post you can check for these sorts of things, but I think many people would let it fly by without really noticing how dumb is sounded.

[Anonymous No.3595487]

>>3595474
In speech, definitely. Still, you don't come up with that kind of verbose speech unless you're trying to sound smart, and if that's your goal then you can check your written post before submitting it.

[Scientist !!ThFjnJh4EkH No.3595492]

>>3595487
For the record, that's what naturally came. I wasn't going out of my way to use anything other than my "natural language".