Solving a Short Heat Question with q = Q/A - Area Calculation Help

[Studious_stud]

Homework Statement

Homework Equations

q = Q/A where q = heat flux, Q = rate of heat transfer, A = area

The Attempt at a Solution

Well I guess my main problem is figuring out the area. I know the answer to the question, but I can't seem to calculate it right.

Thanks everyone

 

[Mapes]

What is the total power output (in W), letting r be the radius and L be the length of the cylinder? What is the surface area of a cylinder, ignoring the ends (which are negligible for a long cylinder)?

 

[Studious_stud]

What is the total power output (in W), letting r be the radius and L be the length of the cylinder? What is the surface area of a cylinder, ignoring the ends (which are negligible for a long cylinder)?

I don't know, those are the only variables given in the question.

 

[Mapes]

I don't know, those are the only variables given in the question.

Yes, I'm asking you to calculate both quantities as part of solving the problem.

 

[Studious_stud]

Yes, I'm asking you to calculate both quantities as part of solving the problem.

Well, I know the surface area is 2pi rh. However, I don't think I've ever seen a formula relating power to radius or length..

 

[Mapes]

You're given the power output per volume, yes? And the volume of the cylinder is easily calculated.

 

[Studious_stud]

You're given the power output per volume, yes? And the volume of the cylinder is easily calculated.

Ahh, I got it now. Thanks!