water cooling

[bapobapobapo]

The hotter the water is the quicker it cools, why?

thankyou

[tony1941]

It's Newton's Law of Cooling. Have a look here:

http://orion.math.iastate.edu/algebra/sp/xcurrent/applet s/cooling.html

[PhilBy]

The above link never worked for me, but as a teenager I had a part time job working behind a bar and I was told to use boiled water that had cooled for the ice cubes as it froze quicker, apparently or so I was told it was becuase boiling the water removed the oxygen and water with less oxygen froze quicker .... and so I presume cools quicker!

[stanleyman]

Simply, the larger the heat difference the quicker the heat can transfer.

[jake-the-peg]

I think you may be struggling towards something called the Mpemba phenomina

Hot water can freeze faster than cold water.

Although it's been "discovered" many times over the centuries it picked up this name from a school student in Tanzania.

There's a nice discussion here:

http://math.ucr.edu/home/baez/physics/General/hot_water.html

[woofgang]

tony's link had a rogue "P" on the end. this one should work

http://orion.math.iastate.edu/algebra/sp/xcurrent/applets/cooling.html

[thebigchill]

Wouldnt that just be momentum causing that? I was never really any good at science in school...