Useless Trivial facts

southerncross said:
I cnduo't bvleiee taht I culod aulaclty uesdtannrd waht I was rdnaieg. Unisg the icndeblire pweor of the hmuan mnid, aocdcrnig to rseecrah at Cmabrigde Uinervtisy, it dseno't mttaer in waht oderr the lterets in a wrod are, the olny irpoamtnt tihng is taht the frsit and lsat ltteer be in the rhgit pclae. The rset can be a taotl mses and you can sitll raed it whoutit a pboerlm. Tihs is bucseae the huamn mnid deos not raed ervey ltteer by istlef, but the wrod as a wlohe. Aaznmig, huh? Yaeh and I awlyas tghhuot slelinpg was ipmorantt! See if yuor fdreins can raed tihs too.
Click to expand...


I find this easy to read, it is the way my post would look without spellcheck and auto correct.
 
1nDbHtS.jpg



SgvGsvn.jpg


frozen waves


Cye5mPy.jpg



Nantucket USA


O1mcXpg.jpg
 
Clawhammer said:
ego2spare said:
0C is not the temperature water freezes. its the temperature that ice melts.
Click to expand...

You're gunna have to spell that one out for me please ego.
Click to expand...

If you have a dish of ice and a dish of water in a room at exactly 0 the ice will very slowly melt but the water won't freeze. At -1 the water will freeze.

Quite amazingly, under the right pressure conditions, there can be a moment (called the triple point) where water can exist as ice without melting, water without freezing and gas without condensing. So you could have a box with steam, liquid water and ice without any of them changing phases.

http://en.wikipedia.org/wiki/Triple_point
 
phrenzy said:
Clawhammer said:
ego2spare said:
0C is not the temperature water freezes. its the temperature that ice melts.
Click to expand...

You're gunna have to spell that one out for me please ego.
Click to expand...

If you have a dish of ice and a dish of water in a room at exactly 0 the ice will very slowly melt but the water won't freeze. At -1 the water will freeze.

Quite amazingly, under the right pressure conditions, there can be a moment (called the triple point) where water can exist as ice without melting, water without freezing and gas without condensing. So you could have a box with steam, liquid water and ice without any of them changing phases.

http://en.wikipedia.org/wiki/Triple_point
Click to expand...

i concur
 
Clawhammer said:
ego2spare said:
0C is not the temperature water freezes. its the temperature that ice melts.
Click to expand...

You're gunna have to spell that one out for me please ego.
Click to expand...


Going back 50 years old high school physics, I think it's due to the direction that heat travels - cold to hot, hence at zero, heat is travelling from minus to zero and hence ice is melting.

A lot of theory has changed since my days were spent learning defunct information so they may have a newer explanation now.
 
In just one day, 200 million work hours are consumed by women collecting water for their families.

Unsafe water kills 200 children every hour.
 
sammysilver said:
Water and cast iron are the only 2 materials expand when they freeze.
Click to expand...
Except for silicon, gallium, germanium, antimony, bismuth, plutonium etc. :P
 
JulieW said:
Clawhammer said:
ego2spare said:
0C is not the temperature water freezes. its the temperature that ice melts.
Click to expand...

You're gunna have to spell that one out for me please ego.
Click to expand...


Going back 50 years old high school physics, I think it's due to the direction that heat travels - cold to hot, hence at zero, heat is travelling from minus to zero and hence ice is melting.

A lot of theory has changed since my days were spent learning defunct information so they may have a newer explanation now.
Click to expand...

Well no physicists here so I went to google and found I was wrong. Heat travels from hot to cold, so my explanation doesn't work, but the theory does. Over to the brains trust

If you think of two 'boxes' of gas. One is hot, one is cold.

In the hot one, the particles are moving faster than they are in the cold one.

If you put the two boxes together and remove the sides so they can mix then the faster particles will flow into the 'cold' box faster than the slower particles from the 'cold' box will flow into the 'hot' one. If you measure the two boxes every so often, you'll notice that the average speed of particles in the 'hot' box goes down (because it's lost some fast ones from itself and gained some slow ones from the 'cold' box) and the average speed of the particles in the 'cold' box goes up (because it's gained fast ones from the 'hot' box and lost some slow ones from itself).

Speed of the molecules is how you work out the temperature, so you can see that the 'cold' one gets faster (ie hotter), and the 'hot' one gets slower (ie cooler). Heat flows from hot to cold...
Click to expand...
 
JulieW said:
JulieW said:
Clawhammer said:
You're gunna have to spell that one out for me please ego.
Click to expand...


Going back 50 years old high school physics, I think it's due to the direction that heat travels - cold to hot, hence at zero, heat is travelling from minus to zero and hence ice is melting.

A lot of theory has changed since my days were spent learning defunct information so they may have a newer explanation now.
Click to expand...

Well no physicists here so I went to google and found I was wrong. Heat travels from hot to cold, so my explanation doesn't work, but the theory does. Over to the brains trust

If you think of two 'boxes' of gas. One is hot, one is cold.

In the hot one, the particles are moving faster than they are in the cold one.

If you put the two boxes together and remove the sides so they can mix then the faster particles will flow into the 'cold' box faster than the slower particles from the 'cold' box will flow into the 'hot' one. If you measure the two boxes every so often, you'll notice that the average speed of particles in the 'hot' box goes down (because it's lost some fast ones from itself and gained some slow ones from the 'cold' box) and the average speed of the particles in the 'cold' box goes up (because it's gained fast ones from the 'hot' box and lost some slow ones from itself).

Speed of the molecules is how you work out the temperature, so you can see that the 'cold' one gets faster (ie hotter), and the 'hot' one gets slower (ie cooler). Heat flows from hot to cold...
Click to expand...
Click to expand...

crystallization of pure liquids usually begins at a lower temperature than the melting point, due to high activation energy of homogeneous nucleation. Freezing does not start until the temperature is low enough to provide enough energy to form stable nuclei. The melting point of water at 1 atmosphere of pressure is very close to 0 C, and in the presence of nucleating substances the freezing point of water is close to the melting point, but in the absence of nucleators water can super cool to 40 C before freezing.
 
JulieW said:
Sorry, 'wrong way round' is colloquial.

In Britain it is illegal to place a stamp on an envelope with The Queen's head inverted.
Click to expand...
But if you're Down Under, wouldn't that then make it rightside up? -bw
 
"Swampy" Marsh never did a hammie and could never touch his toes.

There's something to be said about inflexibility after all.
 
You must log in or register to reply here.
Back
Top