Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
Chery Chery
wrote...
Posts: 3587
7 years ago
A concrete wall of a cold storage room measures 3.0 m high, 5.0 m wide, and 20 cm thick. The inside wall is to be covered by a layer of wood in order to reduce the rate of thermal energy flow through the wall by 90 percent. The inner surface of the wooden wall is maintained at -10°C and the outer surface of the concrete wall is at 20°C. The thermal conductivities of concrete and wood are 0.80 W/m ∙ K (concrete) and 0.040  W/m ∙ K (wood). What should be the thickness of the layer of wood?
A) 60 mm
B) 70 mm
C) 80 mm
D) 90 mm
E) 100 mm
Textbook 
College Physics

College Physics


Edition: 1st
Authors:
Read 345 times
2 Replies
Replies
Answer verified by a subject expert
noreyaganoreyaga
wrote...
Top Poster
Posts: 649
7 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
 Attached file 
Thumbnail(s):
You must login or register to gain access to this attachment.
1

Related Topics

Chery Author
wrote...
7 years ago
I needed this so much, thanks
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  970 People Browsing
Related Images
  
 987
  
 313
  
 9960
Your Opinion
Which industry do you think artificial intelligence (AI) will impact the most?
Votes: 308