/sci/ - Science & Math

yeh, the ice sun would defiitely be far colder.
it would freeze the lava sun into rock, and the outer layer of the ice sun would melt into water, still leaving an icy core.

When two objects with different temperatures combine, the resultant temperature is the sum of the two original temperatures.

p.s. there is and could not be any such thing as a "sun made of ice" or a "sun made of lava"

>>4599547
i'll calculate you sum shit in sec.

>>4599553
>When two objects with different temperatures combine, the resultant temperature is the sum of the two original temperatures.

yes, this is true, i had some boiling water that was 100 degrees C, and added some sugar that was about 20 degrees C to it.
it heated the water up to 120 degrees C and it all boiled off.

>>4599553
>When two objects with different temperatures combine, the resultant temperature is the sum of the two original temperatures.

yeah, that's why both would get hotter than the lava sun was at the beginning.

for example, the ice sun has 270K and the lava sun has 1530K
when combined the total temperature would be 1800K.

>>4599566
eh?

Suns aren't made of either lava or ice. If it's ice, or lava, it's not a sun.

surely the sun would be so hot that the ice would dissociate into hydrogen and oxygen, which would ignite

>>4599574
>suns
>implying there is more than one sun

>>4599572
the temperatures get summed together, 270+1530=1800 dumbass

>>4599561
>>4599566
I really should have thought about that before I posted it.

I was originally going to say mean instead of sum but that wouldn't work either because you're increasing the amount of thermal energy by combining them so the temperature shouldn't decrease.

>>4599576
>implying there's not

If we ever set up an extrasolar colony, I'm pretty sure we'll still call the primary star "the sun".

>>4599576
the sun is just a star you know, theres nothing special about it.
in fact its not even a particularly big star.

and theres trillions of stars

>>4599576
Isn't a sun just any star that has planets orbiting it?

>>4599585
Yeah but it's the only one we named Sun. It's like saying New York instead of city.

>>4599592
Pretty sure the name is Sol. Just like we could call any moon "the moon", but there's only one Luna.

>>4599594
(cont)
Though, of course, this is all a matter of semantics and it doesn't matter so long as we find terms that work.

this isn't funny

>>4599592
ah, ok
although if you say '2 suns crashing together...' people will know you mean stars

>>4599599
neithers your face

>>4599600
yeah, but if you say '2 new yorks crashing together...'

Okay, so supposing the suns are equal in volume, and the one made of lava is initially 1200 celsius (that's typical lava temperature), one of ice is 0 celsius. So the lava one will melt the ice one and it's temperature will drop only 72 degrees. So it's obvious that the ice one will be evaporated easily, not to mention the heat from the impact of two suns.

>>4599609
youd think they mean it hypothetically, so like new york, colliding wit ha clone of new york.
they'd still understand it.
(also, really wierd, i guessed that you'd make this post before you even did)

>>4599609
You would if two objects the size of New York were crashing into each other.

Anyway, like I said, "sun" (note the lower case 's') just means a star with planets orbiting it.

>>4599620
see:
>>4599566

yes, it would evaporate

also
>not using K

>for example, the ice sun has 270K and the lava sun has 1530K
when combined the total temperature would be 1800K.

>>4599654
Temperature is energy and energy is added. Checkmate, athiests.

>>4599666
4/10
learn2entropy

>>4599668
energy=boltzmann's constant*temperature
more energy=more temperature
checkmate

>>4599675
so add energy and calculate out the resulting temperature. btw you are retarded or troll.
matecheck..

>>4599683
No, you are the retard here.
as seen in post: >>4599553
>When two objects with different temperatures combine, the resultant temperature is the sum of the two original temperatures.
>>4599566
This post was obviously a joke, if you know what that is.

>>4599675
energy=boltzmann's constant*temperature
niggawhat.jpg
at least get your formulas correct

>>4599734
>E = kT

I don't see what's wrong with this. In several fields energy is measured in kelvins for a reason.

>implying sun is made of LAVA
>implying it's not a plasma
>2012

I was waiting for this to come back.

>>4599742
Describe how to use this formula and where it's used
>mfw

>The temperatures combine and you get the sum, so if a 200k ice sun and a 1600k lava sun combine, you get an 1800k sun.
But then why is it that if I put hot water into cold water, I get around room temperature water? Am I a wizard?

The volume of the sun is 1.4E27 cubic meters. The density of ice is 917 kg/m3. Therefore the mass of an "ice sun" would be 1.3E30 kg. The mass of our sun is 2.0E30 kg. The mass of a sun made of lava is 3.6E30 kg, which is heavier than our sun.

The mass required for transformation into a star is 80 Jupiter masses. This is 80*1.8986×10E27 or 1.5E29. Both of these "suns" have the mass to become stars and sustain fusion. Therefore they will cease to be suns made of ice or lava.

Let's assume the stars are initially binary systems, treat them as point particles, and ignore tidal and general relativistic effects on their orbits. This allows us to use the N-code (Aarseth 1999) and corresponding computational methods. I calculate that at velocities below 750 km/s, the stars would coalesce. At higher velocities, the lava star would destroy the ice star, but be severely damaged in the process.

>>4599784
wow....thanks....

it woud melt

Wouldn't it be appropriate to use second law of thermodynamics for this? Heat flows from a hotter object to a cooler object in a closed system, not the other way around. Thus, the ice sun would melt.

(1) If it's made of ice, it's not sun, it's a planet.
(2) Suns aren't made of lava, they are made of plasma, created due to thermonuclear fusion in sun's core.
(3) If this hypothetical scenario happened, the icy planet would melt before reaching the sun.

>>4601677
>they are made of plasma

>>4601686
I don't see a problem with that. A plasma is like a gas where some or all of the particles are ions, and stars are made almost entirely of hydrogen nuclei and helium.

Bump for interest

>>>Really you'd need a lot more information about the stars. Their mass and their specific heat would be necessary, both of the liquid within the ice (assuming not perfect water) and the composite that makes up the lava.
>>>But, if this was an episode of the magic school bus, the ice sun would melt, and the now water sun would cause the lava sun to cool creating a rock sun (big planet).
>>>Perhaps, the rock sun would only be rock on the outside, with a lava mantle and core. the water sun would put water on the surface of the planet, and the cooling fires of the lava sun could create an atmosphere.
>>>Damn OP, i think you created the earth.