98Views10Replies

Author Options:

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 ?

10 Replies

user
Kiteman (author)2014-04-29
user
steveastrouk (author)Kiteman2014-05-02

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

Select as Best AnswerUndo Best Answer

user
Vyger (author)Kiteman2014-04-29

hopefully that and not work releated.

Select as Best AnswerUndo Best Answer

user
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.

Select as Best AnswerUndo Best Answer

user

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

Select as Best AnswerUndo Best Answer

user
vickyraja (author)tgferreira1842014-04-30

thanks for your answer....your answer is related to radiation of surface...but i need absorption capability of surface for that question....

Select as Best AnswerUndo Best Answer

user
rickharris (author)2014-04-29

depends on the colour of thd surface

Select as Best AnswerUndo Best Answer

user
Vyger (author)rickharris2014-04-29

+ 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.

Select as Best AnswerUndo Best Answer

user
mpilchfamily (author)Vyger2014-04-29

Lets not forget the starting temp of the surface.

Select as Best AnswerUndo Best Answer

user
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

Select as Best AnswerUndo Best Answer