Welcome

The walls of a house consists of L=0.02 m thick plywood backed by insulation with the same thickness. The temperature of the inside surface of the wall (the insulation side) is T2=25 oC, while the temperature at the outside surface (the plywoodside) is T1= -15 oC, both being constant. The thermal conductivities of the plywood and insulation are, respectively k1=0.09 J/(s m oC) and k2=0.03 J/(s m oC). a) Find the temperature T at the plywood – insulation interface.  b) If the total surface area of the walls is 70 m2, find the amount of heat the house loses in 24 hours. (Assuming all the heat losses are due to the thermal conductivity of the walls).  c) Does the entropy of the house change? If it does, by how much? d) Does the entropy of the Universe change? If it does, by how much? e) If the cost of electric power is \$0.15 per kilowatt hour, how much one has to pay to keep the house warm for 24 hours?

The walls of a house consists of L=0.02 m thick plywood backed by
insulation with the same thickness. The temperature of the inside surface of the wall (the insulation side) is T2=25 oC, while the temperature at the outside surface (the plywoodside) is T1= -15 oC, both being constant. The thermal conductivities of the plywood and insulation are, respectively k1=0.09 J/(s m oC) and k2=0.03 J/(s m oC).

a) Find the temperature T at the plywood – insulation interface.
b) If the total surface area of the walls is 70 m2, find the amount of heat the house loses in 24 hours. (Assuming all the heat losses are due to the thermal conductivity of the walls).
c) Does the entropy of the house change? If it does, by how much?
d) Does the entropy of the Universe change? If it does, by how much?
e) If the cost of electric power is \$0.15 per kilowatt hour, how much one has to pay to keep the house warm for 24 hours?

Tired of numerous paper assignments?
Rely on us and receive professional paper writing assistance!

Who We Are

We are a professional website for customized writing. If you searched a question and stumbled into our website, you are in the right place to receive assistance with your coursework.

Do you handle any type of coursework?

Yes. We have displayed prior orders to demonstrate our experience. We can answer this question for you as we have previously. Please fill out our Order Form so that we may ensure its flawlessness. Correctly completing the order form will help our staff with reference, requirements, and future communication.

Is it hard to Place an Order?

1. Click on the “Order Now” tab at the top menu or “GET A FREE QUOTE” icon at the bottom and a new page will appear with an order form to be filled
2. Fill in the initial requirements in the small order form located on the home page and press “continue” button to proceed to the main order form or press “order” button in the header menu. Starting from there let our system intuitively guide you through all steps of ordering process. Submit detailed paper instructions, upload necessary files if needed and provide your contact information – you are almost done!
3. Proceed with the payment- click on “PROCEED TO CHECKOUT” at the bottom of the page. From there, the payment sections will show, follow the guided payment process and your order will be available for our writing team to work on it. All your payments are processed securely through PayPal. This enables us to guarantee a 100% security of your funds and process payments swiftly.