A cool trick with hot water at -40 degrees centigrade

Hi,

At around -40 degrees centigrade, water freezes immediately.

Watch this amazing demonstration.



How is it that we do not freeze too when we step outside the heated homes?
Homoeostasis is the answer. Cold blooded animals will freeze up. Warm blooded animals like us and the other mammals and of course the birds have inbuilt mechanisms to keep our body temperature constant whatever the outside temperature.
We have to get the energy from our food through the process of respiration.

Cheers