For the outside walls of a home, two layers are often combined, such as a layer of wood and a layer of sheet rock (plaster). The rate of heat transfer becomes: P = Δ Q/second = A Δ T/ (Rw+Rsr) .  What is the advantage of using combined 2-cm layers of wood and plaster versus using just a 4-cm layer of wood for home insulation. Assume a wall area A = 15 x 10 -4 cm2, and an indoor outdoor temperature difference of 15 degrees C.

Question

For the outside walls of a home, two layers are often combined, such as a layer of wood and a layer of sheet rock (plaster). The rate of heat transfer becomes: P = Δ Q/second = A Δ T/ (Rw+Rsr) . 

What is the advantage of using combined 2-cm layers of wood and plaster versus using just a 4-cm layer of wood for home insulation. Assume a wall area A = 15 x 10 -4 cm2, and an indoor outdoor temperature difference of 15 degrees C. 

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Physics

Thermodynamics

Related Physics Q&A

Find answers to questions asked by students like you.

Q: What is the mass of a mallard duck whose speed is 8.8 m/s and whose momentum has a magnitude of 12 k...

A: Consider the mallard duck having mass m  moving with speed v and its momentum is denoted by p.

Q: A projectile is launched upward at an angle. What should this angle be with respect to the horizonta...

A: A projectile is launched upward at an angle. The angle will be with respect to the horizontal in ord...

Q: why isnt there a single convection cell in each hemisphere?

A: Because more solar energy hits the equator, the air warms and forms a low pressure zone. If the Eart...

Q: Problem 1:  You have been hired to design a family-friendly see-saw. Your design will feature a unif...

A: (a)The torque is defined as the product of force and the perpendicular distance. Consider the figure...

Q: Consider the 14.5 kg motorcycle wheel shown in the figure. Assume it to be approximately an annular ...

A: Click to see the answer

Q: Ch 24, Problem 31 The power radiated by the sun is 3.9 × 1026 W. The earth orbits the sun in a nearl...

A: Given information:Power emitted by the sun (P0) = 3.9 × 1026 WRadius of earth orbit (R) = 1.5 × 1011...

Q: A 6.58 g pellet is shot horizontally from a BB gun at a speed of 23.8 m/s into a 26.3 g wooden block...

A: According to law of conservation of momentum, the momentum before collision will be equal to the mom...

Q: . A rocket with a mass of 2.30×1062.30×106 kg has a relativistic kinetic energy of 3.70×10233.70×102...

A: Consider the rest mass of a rocket is denoted by m0 and its relativistic kinetic energy is denoted b...

Q: A hypodermic needle is 3.22 cm in length and 0.21 mm in diameter. What pressure difference between t...

A: Write the expression for flow rate of the water.