anonymous
  • anonymous
A carpenter builds a solid wood door with dimensions 1.95 m × 0.91 m × 6.0 cm . Its thermal conductivity is k=0.120W/(m⋅K). The air films on the inner and outer surfaces of the door have the same combined thermal resistance as an additional 1.9 cm thickness of solid wood. The inside air temperature is 23.0 ∘C , and the outside air temperature is -5.00 ∘C .
Physics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
What is the rate of heat flow through the door? Express your answer using two significant figures.
anonymous
  • anonymous
what's the specific heat capacity of the material in question?
anonymous
  • anonymous
I just noted your k value I missed it.

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
Alrigth you are aware that measurement of temperature is in Kalvin scale.
anonymous
  • anonymous
Think of the heat transfer from inside the door to the surface door as an act of thermal equilibrium. All the objects in contact with different temperatures try to reach equilibrium.
anonymous
  • anonymous
First of all you need to calculate the surface of the door and volume of the door.
anonymous
  • anonymous
And set everything to meters rather than centimeters because k value is expressed with meters/ Are you reading this? You seem unresponsive.
anonymous
  • anonymous
This is a problem on how different objects in contact with different temperatures come to thermal equilibrium depending on the surface as well as the volume. Note that it all depends on the potential thermal energy at play.
anonymous
  • anonymous
You can use Fourier's law \[Q=\frac{ kA }{ t }(T_{high}-T_{low})\] Q = heat rate k = thermal conductivity A = cross-sectional area of the surface perpendicular to the flow. Looks like that's 1.95 m by 6.0 m t = thickness of the surface. In this case you'd have to add an extra 1.9 cm to the 0.91 m to get the total thickness of the door
anonymous
  • anonymous
i got .1399
anonymous
  • anonymous
but i gt it wrong
anonymous
  • anonymous
check your units. Make sure all the lengths are in meters
anonymous
  • anonymous
Q = (0.12 W/m-K)(1.95 m)(6.0 m)(23 °C - (5 °C))/(0.91 m + 0.019 m)
anonymous
  • anonymous
i pluged it in still wrong

Looking for something else?

Not the answer you are looking for? Search for more explanations.