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

how much temperature increased in that place ?

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## 10 Replies

Kiteman (author)2014-04-29

I smell homework...

steveastrouk (author)2014-05-02

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

Vyger (author)2014-04-29

hopefully that and not work releated.

tgferreira184 (author)2014-04-30

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.

steveastrouk (author)2014-05-01

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

vickyraja (author)2014-04-30

rickharris (author)2014-04-29

depends on the colour of thd surface

Vyger (author)2014-04-29

+ 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.

mpilchfamily (author)2014-04-29

Lets not forget the starting temp of the surface.

steveastrouk (author)2014-04-29

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