please help me with this????

Question

..please write a paragraph about this?

How a skier can manage to ski with short and T-shirt on using the terms: conduction, convection, and radiation..

please i will give 10 points for the best answer!!!!!

for helplessr...: i'm not asking about evaporation and stuff..i'm asking you to write a paragraph about if a skier can manage to ski in.....using the three terms: conduction, convection, and radiation...

for al of you guys who answered, i really appreciate it..but you are not answering to the exact question...:(

Answer 1

How do you expect to learn anything if you constantly ask people to do your work for you? Read your books, research, use the dictionary and ask your teachers for help. You will get more satisfaction if you do your own work.

Answer 2

Heat loss is governed by the following physical means.

Conduction: transfer of heat from the body by direct physical contact.
Convection: transfer of heat by movement of air or water over the body.
Radiation: radiation of heat from the body into space.
Evaporation: loss of heat by the body when converting sweat to vapor.

In a cold or cool environment, conduction and convection, along with some evaporation of sweat, can maintain a runner's increased internal core heat balance. As the temperature rises, evaporation of sweat becomes the main way of controlling the rise in core temperature. Evaporation can keep the body's exercising temperature in the normal range of 102-105 F under normal environmental circumstances. Cold is usually not as hazardous for the runner as is heat. With exercise metabolism, the body is able to maintain a constant core temperature in air temperatures as low as - 22F. This is regulated by internal mechanisms and not necessarily by the heat produced from exercise. Shivering can be seen during exercise when the core temperature is low. Under this stress, oxygen consumption is higher than when doing the same amount of exercise in warm weather. Hope this helps.

Answer 3

The flow of heat by conduction occurs via collisions between atoms and molecules in the substance and the subsequent transfer of kinetic energy. Let us consider two substances at different temperatures separated by a barrier which is subsequently removed, as in the following figure.
If your skin touches snow, heat is transferred from skin to snow via conduction.

Convection is the flow of heat through a bulk, macroscopic movement of matter from a hot region to a cool region, as opposed to the microscopic transfer of heat between atoms involved with conduction. Suppose we consider heating up a local region of air. As this air heats, the molecules spread out, causing this region to become less dense than the surrounding, unheated air.
Air flowing past your skin transferres heat from skin to air via convection.

The third and last form of heat transfer we shall consider is that of radiation, which in this context means light (visible or not). This is the means by which heat is transferred, for example, from the sun to the earth through mostly empty space - such a transfer cannot occur via convection nor conduction, which require the movement of material from one place to another or the collisions of molecules within the material.
Often the energy of heat can go into making light, such as that coming from a hot campfire. This light, being a wave, carries energy, as we saw in the last chapter, and so can move from one place to another without requiring an intervening medium. When this light reaches you, part of the energy of the wave gets converted back into heat, which is why you feel warm sitting beside a campfire. Some of the light can be in the form of visible light that we can see, but a great deal of the light emitted is infrared light, whose longer wavelength is detectable only with special infrared detectors. The hotter the object is, the less infrared light is emitted, and the more visible light. For example, human beings, at a temperature of about 37 o Celsius, emit almost exclusively infrared light, which is why we don't see each other glowing in the dark. On other hand, the hot filament of a light bulb emits considerably more visible light.

Answer 4

DanE may be you should stop plagiarizing answer off the web. anybody can copy and paste. why don't you have any thought of your own. stop pretending to be an expert. DON'T GIVE HER BEST ANSWER!!!!!!