At what rate does it emit energy by radiation?

AI Thread Summary
To calculate the rate at which a red-hot horseshoe emits energy by radiation, one must apply the principles of blackbody radiation. The horseshoe has a surface area of 60 cm² and is heated to 930°C. Understanding Kirchhoff's law of thermal radiation is essential for this calculation. The original poster expresses confusion about blackbody radiation and seeks assistance. The discussion highlights the need for clarity on thermal radiation concepts to solve the problem effectively.
acg7160
Messages
11
Reaction score
0

Homework Statement


A horseshoe has a surface area of 60 cm^2, and a blacksmith heats it to a red-hot 930 C. At what rate does it emit energy by radiation?


Homework Equations





The Attempt at a Solution



I'm pretty lost here...
 
Last edited by a moderator:
Physics news on Phys.org


Do you know of blackbody radiation?
 


No I do not.
 


Can anyone help me?
 


I did not get it in time, thanks anyway.
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Back
Top