Math People- Help, Urgent!

[Legolas]

sorry i cant help 4thgen, but im only in 8th grade and we havent learned a bit of physics

[Rappy]

Originally posted by Legolas@15 March 2004 - 02:07
i am solving a set of simlutaneous equations. they are as follows:

[SIZE=14] x[SIZE=1] 2[SIZE=14] +4y[SIZE=1] 2[SIZE=14] =16
[SIZE=14] xy=4

the small numbers indicate exponents. i have two of these for my math hw, but for now, if anyone knows how to solve this one, pleasse help, fast

edit- this isnt coming out right, so in words-

x squared + 4y squared= 16
xy=4

help please

would you like me to add the size too?

[james_bond_rulez]

hang on let me think....

[h1]

Nope, it's a simple problem requiring only water's specific heat relating to condensation and vaporization.

But how is that physics?

[kAb]

its actually not that complicated, we learned that stuff in algebra 1. i see lamsey beat me to it though

[4th gen]

Originally posted by haxor41789@15 March 2004 - 04:55
Nope, it's a simple problem requiring only water's specific heat relating to condensation and vaporization.

But how is that physics?

Do you mean latent heat?
It's more physics than anything else...(except possibly chemistry)

[thewizeard]

Originally posted by RapFan+15 March 2004 - 04:19--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (RapFan &#064; 15 March 2004 - 04:19)</td></tr><tr><td id='QUOTE'><!--QuoteBegin-Legolas@15 March 2004 - 02:07
i am solving a set of simlutaneous equations. they are as follows:

[SIZE=4] x[SIZE=1] 2[SIZE=14] +4y[SIZE=1] 2[SIZE=14] =16
xy=4

the small numbers indicate exponents. i have two of these for my math hw, but for now, if anyone knows how to solve this one, pleasse help, fast

edit- this isnt coming out right, so in words-

x squared + 4y squared= 16
xy=4

help please

would you like me to add the size too?[/b][/quote]
I think you should just close the tags

[I.am]

@nigel

Edit: feeling too much in a holiday mood to read and answer all through

[lynx]

Originally posted by 4th gen@15 March 2004 - 02:26
Can&#39;t sleep

Ok, so now that this is homework corner, let me ask a question (physics, not maths):

"1 litre of water is heated from 20 degrees celsius until it has boiled and completely evaporated. The steam then condenses onto a second surface at 20 degrees celsius. How much energy has been transferred from the first surface to the second?"

Now, the way I&#39;m thinking, it&#39;s just gonna be the specific heat needed to cool the water from 100 degrees celsius down to 20 degrees (i.e. 83600J), plus the latent heat of vapourisation of water (i.e. 2260000J). Any thoughts though people?

This is just stupid.

It would be a lot easier to carry it in a bucket.