# if 33 degree celsious falls on 1 square-feet surface for 1 hour mean what will be temperature after 1hr in that area?

how much temperature increased in that place ?

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Kiteman3 years ago

I smell homework...

3 years ago

I smell homework not written down properly.....

3 years ago

hopefully that and not work releated.

tgferreira1843 years ago

It is calculated with stefan-boltzmann law.

http://en.wikipedia.org/wiki/Stefan-Boltzmann_law

The temperature (kelvin) is the fourth root of the fraction radiation's power(W/sq meter) over the body's emissivity (value from 0 to 1, beeing 0 a very reflective body and 1 a black body) times the area (sq meters) times the stefan-boltzmann constant (5,67x10^-8). The tine only affects the heating time, meaning that a smaller amount of time may not allow the body to reach it's maximum temperature.

3 years ago

Sorry, but you have not got enough data. Degrees. Celsius don't 'fall'on

vickyraja (author)  tgferreira1843 years ago

rickharris3 years ago

depends on the colour of thd surface

3 years ago

+ 1

And also the reflectivity of the surface and the roughness. Mirrors generally don't get very hot as the reflect away the energy falling on them.

3 years ago

Lets not forget the starting temp of the surface.

steveastrouk3 years ago

How does temperature "33 degree Celsious" fall ? Its a scalar, the surface IS 33 C. You don't have enough information, you don't have the RIGHT information