× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
L
3
d
3
y
3
a
3
n
3
d
3
e
3
d
3
c
3
p
3
M
3
a
3
New Topic  
ppk ppk
wrote...
Valued Member
On Hiatus
Posts: 3560
12 years ago
A blacksmith is flattening a steel plate, 10 cm × 15 cm × 1 mm. He has heated the plate to 900 K. If the emissivity of the plate is 0.75, what is the total rate of radiation of energy? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4).  Ignore heat exchange with the surroundings.
A) 360 W
B) 760 W
C) 790 W
D) 850 W
E) 880 W
Read 2666 times
1 Reply

Related Topics

Replies
wrote...
Educator
12 years ago
D
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  987 People Browsing
Related Images
  
 303
  
 267
  
 728
Your Opinion
Where do you get your textbooks?
Votes: 447

Previous poll results: What's your favorite math subject?