Sunday
March 29, 2015

Homework Help: physics

Posted by Redgy22 on Friday, November 30, 2012 at 9:49pm.

In an electrically heated home, the temperature of the ground in contact with a concrete basement wall is 13.0 oC. The temperature at the inside surface of the wall is 21.1 oC. The wall is 0.19 m thick and has an area of 8.3 m2. Assume that one kilowatt hour of electrical energy costs $0.10. How many hours are required for one dollar's worth of energy to be conducted through the wall?
I'm using q=kAdT/s and getting 601.5 watts. I'm having trouble figuring out the hours requred. please help

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - A brick wall with a thermal emissivity of 0.8 is heated by the sun all...
PHYSICS - Bricks have a thickness of 12 cm, if an external wall of the house ...
physics - A tennis ball with a speed of 12.5 m/s is moving perpendicular to a ...
Physics - A tennis ball with a speed of 14m/s is moving perpendicular to a wall...
Physics - A tennis ball with a velocity of 24.4 m/s is thrown perpendicularly at...
physics - A 3.42-kg steel ball strikes a massive wall at 10.0 m/s at an angle of...
physics - A 2.42 kg steel ball strikes a massive wall at 11.7 m/s at an angle of...
physics - A 3.56-kg steel ball strikes a massive wall at 10.0 m/s at an angle of...
physics - A 3.56-kg steel ball strikes a massive wall at 10.0 m/s at an angle of...
Physics URGENT!!! - A 4.02 kg steel ball strikes a massive wall at 11.8 m/s at ...

Members