Question

A typical snow igloo (thermal conductivity about 1/10 of ice) is shaped like a hemisphere o inner radius 1.5 m with 0.36-m thick walls. Part A What is the conductive heating rate through the walls if the inside temperature is 11°C and the outside temperature is -12 C Hint: Use the conductive heating equation Conduction KA(T2 T1)/l, where A is surface area, l is the distance that the thermal energy travels, and K is thermal To calculate the surface area use the mean radius of the wall that is an average of inner and outer radii.

0 0
Add a comment Improve this question Transcribed image text
Answer #1

T : 12 C 24 in Thicko 36 m lo Conduchiun 0.36

Add a comment
Know the answer?
Add Answer to:
A typical snow igloo (thermal conductivity about 1/10 of ice) is shaped like a hemisphere of...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions
  • A typical snow igloo (thermal conductivity about 1/10 of ice) is shaped like a hemisphere of...

    A typical snow igloo (thermal conductivity about 1/10 of ice) is shaped like a hemisphere of inner radius 1.5 m with 0.36-m thick walls. Part A What is the conductive heating rate through the walls if the inside temperature is 11 ∘C and the outside temperature is -15 ∘C ? Hint: Use the conductive heating equation HConduction=KA(T2−T1)/l, where A is surface area, l is the distance that the thermal energy travels, and K is thermal conductivity. To calculate the surface...

  • In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius

    In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction properties of the wall So we can consider the wall to have a thermal conductivity of k(wall) = 0.048 W/m/K . We will take the thickness of the walls and ceiling to be L(wall) = 12...

  • 12,/A cylindrical copper kettle has a 10 e radius and walls that are 2.0 mm thick....

    12,/A cylindrical copper kettle has a 10 e radius and walls that are 2.0 mm thick. The that are 2.0 mm thick. The temperature of the outside surface (in contact with the stove) is 102.0°C and the inside wall of the kettle is at 100.0°C. At what rate is energy being transferred through the bottom of the kettle? And by what method of energy transfer? The thermal conductivity of copper is k 397 J/(s-m·°C)

  • 2.) A plane wall is made of brick with a thermal conductivity of 1.5 W/(m-K). The...

    2.) A plane wall is made of brick with a thermal conductivity of 1.5 W/(m-K). The wall is 20 cm thick and has a surface area of 10 m2. One side of the wall is exposed to outside air blowing against the wall resulting in a heat transfer coefficient of 20 W/(m2-K). The other side is exposed to an air-conditioned room with a convective heat transfer coefficient of 5 W/(m2-K). a. What are the thermal resistances corresponding to conduction through...

  • A large steam pipe is covered with 1.5-cm-thick insulating material of thermal conductivity 0.29 J/(s m...

    A large steam pipe is covered with 1.5-cm-thick insulating material of thermal conductivity 0.29 J/(s m °C). How much energy is lost every second when the steam is at 215 °C and the outside of the pipe has a temperature of 20°C? The pipe has a circumference of 7.75 m and a length of 60 m. Neglect losses through the ends of the pipe

  • In this problem, you will estimate the heat lost by a typical house, assuming that the...

    In this problem, you will estimate the heat lost by a typical house, assuming that the temperature inside is Tin=20∘C and the temperature outside is Tout=0∘C. The walls and uppermost ceiling of a typical house are supported by 2×6 inch wooden beams (kwood=0.12W/(mK)) with fiberglass insulation (kins=0.04W/(mK)) in between. The thickness of the wall is Lwall=18cm allowing for interior and exterior covering. Assume that the house is a cube of length L=9.0m on a side. Approximate that the roof has...

  • Water flows through a 0.5 mm thick tube ( thermal conductivity of 16 W/m..C) with a...

    Water flows through a 0.5 mm thick tube ( thermal conductivity of 16 W/m..C) with a inner diameter of 1.5 cm at 70°C such that the convective heat transfer coefficient is 3500 W/m² . •C. Let us consider the outside of the tube is 20oC and it loses heat by free convection with ho=7.6W/m² • •C. a. Draw the schematic diagram of the process b. Find out which one is the controlling resistance c. Calculate the overall heat-transfer coefficient per...

  • pts.) Consider a long resistance wire of radius ri-1.5 cm and thermal conductivity m'к in which...

    pts.) Consider a long resistance wire of radius ri-1.5 cm and thermal conductivity m'к in which heat is generated uniformly as a result of resistance heating at a e wire is embedded in a 1.0-cm-thick layer of ceramic whose thermal bTeam. W/m K. If the outer surface temperature of the ceramic layer is nstant rate. The nductivity is keramic-1.5 to be T,-45°C and the maximum temperature at the center is 375°C. Determine the ar generated per unit volume in (W/em)...

  • On a cold night the temperatures of the two surfaces of a glass windowpane in a...

    On a cold night the temperatures of the two surfaces of a glass windowpane in a house are 7.8° C on the outer surface and 8.0° C on the inner surface when the air temperature is 0° C outside and 21.2° C inside. The glass is 3.33 mm thick. (The thermal conductivity for glass is 0.8 W/m-C°.) (a) Find the rate at which heat is conducted through the glass per square meter of window area. (b) Find the value of...

  • 1. one wall is formed by two materials, the first one is 15cm thick and has...

    1. one wall is formed by two materials, the first one is 15cm thick and has a thermal conductivity of 1W/mk and the second one is cork with an unknown thick. If the temperature of the inner wall is 22°C and the temperature of the outer surface is -10°C find: a) the necessary thick of the cork to maintain a heat loss of 8W. Consider an area of 1m2! b) the interface temperature. Note: use a scheme that represents the...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT