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Use the well-known formula: dQ=m.s.dt

where dQ=heat exchanged, m=Mass of the substance (water in this case), s=specific heat ( for water it is 1 calorie/gram-Kelvin) and dt=change in temperture

However, if the Water is in transition state from Ice, use: Q=m.L

L=Latent heat of fusion of Ice.

Generally, a few calories of heat are lost depending upon:

1. The mass of water

2. Humidity in air

3. Surface Area of Skin in contact with water

Say, for a little amount of water (take 5 gram)poured uniformly over unit skin area, the heat lost is 5 calorieprovided the temperature change is unity under ideally assumed conditions.

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Q: How much heat does water take away from the body?
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The rate at which the body loses heat in cold water depends on factors like water temperature, body composition, and level of physical activity. Generally, the body loses heat much faster in cold water compared to cold air, as water conducts heat away from the body 25 times faster than air. Hypothermia can occur in cold water in as little as 15 minutes.

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Can water viscosity affect how much heat a body of water absorbs?

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How water is a good regulator of body temperature?

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