Descirbe how your body dissipates heat energy.?

Question

Descirbe how your body dissipates heat energy.?

Answer 1

The body dissipates heat in four ways, depending on the temperature and humidity certain dissipation types may not work.

Conduction: If the body is in contact with anything cooler than it (such as clothing) heat is shed into the object. However, the opposite is also true - if the body is in contact with an object hotter than it your body will absorb some of the heat energy. This accounts for 2-5% of the body's heat loss.

Convection: The body's contact with the air around it creates heat dissipation through convection currents (breezes, wind, etc). The opposite is also true, when the temperature is hotter than the body's temperature, the body will absorb heat energy. Core body temperatures for athletes in good shape and hydration increase at approx 1c/h without additional fluid intake. Convection accounts for 5-10% of the body's heat loss.

Radiation: Radiation of heat via electromagnetic waves is the body's most efficient cooling. It accounts for 50-65% of heat loss. Radiation functions as long as there is a temperature difference between the air and the body. Radiation functions opposite, but is mainly the absorption of EM waves through UV radiation. Radiation ceases functioning on or near 95F (35C)

Evaporation: Evaporation of sweat and saliva accounts for 30-35% of the body's heat loss. Evaporation ceases to be effective at 100% humidity.

Answer 2

It's not just how hot it is that can kill humans and animals, it's how humid it is. You're body tries to cool itself through the mechanism of evaporation or sweat, when a cool breeze comes along, the sweat cools your body down. But when the humidity is so high that you feel like you're in a steam bath, your heart begins to suffer. You're normal body temperature is 98.6 F, but when the temperature outside exceeds 102 degrees F, you're blood begins to overheat as though you had a fever.  

Furry animals and creatures have it even worse, even though they shed some hair in the summer, they still have a furry coating which traps and exacerbates the heat.  Unless they find salt licks and water in nature, many animals face dehydration and even stroke unless they can find shelter or burrow underground.

Mid-day is the worst for trees, burning leaves and foliage on very hot days and causing baby plants to wither.  Make sure you water them down several times a day in the summer.

Remember, 52,000 people died in western Europe in 2003 due to the sweltering heat of the Sun. Eventually, we'll all have to migrate to the moon or Mars to escape the wrath of our dying Sun. Terraforming a moon takes time, it doesn't just happen by itself. We must petition NASA and all the space agencies in the world to build "dynamos" on the 166 moons that have been discovered in our solar system. A dynamo shields out dangerous cosmic radiation (Galactic, solar, extragalactic, ultra high energy, and anamolous rays) while an atmosphere protects us from gamma, uv and x-rays.

Unfortunately, the Earth is similar to a fishbowl, it just fills up with water unless some of it is removed. Potable bottled water should be shipped to the moon and Mars to offload it from Earth, Don't forget that water vapor and CO2 are the 2 primary byproducts of combustion of all fuels, and also of respiration. Think of all the animals respiring.

Combustion:

Butane C4H10 + 6.5 O2 --> 4 CO2 + 5 H2O

Aerobic Respiration:

C6H12O6 + oxygen --> 6 CO2 + 6 H2O + energy