Body heat is lost through conduction approximately 25 times more rapidly in water than in air.

Here's why:

* Thermal Conductivity: Water has a much higher thermal conductivity than air. This means it conducts heat away from your body much more efficiently.

* Density: Water is denser than air, meaning there are more molecules packed together. This increases the rate of heat transfer by conduction.

Important Note: While water conducts heat away from your body faster, you may feel colder in air at the same temperature due to the cooling effect of evaporation.