When you drink cold water, your body must expend metabolic energy in order to maintain normal body temperature (37â° c) by warming up the water in your stomach. could drinking ice water, then, substitute for exercise as a way to "burn calories? " suppose you expend 286 kilocalories during a brisk hour-long walk. how many liters of ice water (0â° c) would you have to drink in order to use up 286 kilocalories of metabolic energy? for comparison, the stomach can hold about 1 liter.

Explanation:

Given:

Initial temperature of water,  

final temperature of water,

energy spent in one hour of walk,

volumetric capacity of stomach,

Now, let m be the mass of water at zero degree Celsius to be drank to spend 286 kilo-calories of energy.

.....................................(1)

where:

m = mass of water

Q = heat energy

= temperature difference

Putting values in the eq. (1):

Since water has a density of 1 kilogram per liter, therefore the volume of water will be:

need to see circuit to get time constant

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.