Constant of thermal conductivity and heat flow in a given time

[Bolter]

Homework Statement

Working out constant of thermal conductivity and heat flow in a given time

Relevant Equations

Q/t = KA(T1 – T2)/L

Here is the Q below

I want to see if my values for part b) is okay?

This is what I have tried:

Any help would be nice! Thanks

 

[Cutter Ketch]

It all looks great. I’m confused why they would even ask part b. You worked it out from your part a answer, and perhaps that is what they had in mind. However, you could have answered it trivially. They tell you the flow is 25 J/s. The net flow is just that times 12 minutes.

 

[Bolter]

It all looks great. I’m confused why they would even ask part b. You worked it out from your part a answer, and perhaps that is what they had in mind. However, you could have answered it trivially. They tell you the flow is 25 J/s. The net flow is just that times 12 minutes.

I actually did do it the shorter way which was that 25 joules was given off each second. So total heat flow in 12 mins is '25 * 12 * 60 = 18,000 joules'. Just went for the longer way to double check that my value of K was correct. Should have made it more clearer though nonetheless in my working by showing that.