Question

Thermodynamics

Answer 1

@imqwerty

Answer 2

Can you attach the screenshot link to the second and third images cuz they're loading very slowly

Answer 3

Okay i have a silly question - How would you know if the slabs are connected in series or in parallel

Answer 4

Wait nvm its series(because of the direction of heat flow is through the cross section)
The a, b, c part answers are correct

Answer 5

But we should consider the lengths in meters right?
Also you can use the fact that heat current Q/t is same for all surfaces in a series connection

Answer 6

Ok you used it there already

Answer 7

I think all the work is correct but i don't know much about the R1 and R5

Answer 8

Ok you used it there already

Answer 9

@imqwerty it's all good. We should have a resistance on the outside of the wall. I am following an instructors example.

Answer 10

The walls are attached in a horizontal direction because it's a wall of a house and the l1, l2, and l3 are the little delta.

Answer 11

yeah

Answer 12

does part d look good?

Answer 13

yeah it looks correct but only thing i'd change would be converting the lengths into si units

Answer 14

they are in SI units. They are in m

Answer 15

I changed them from mm to m

Answer 16

its all okay then

Answer 17

okay