The thermal conductivity of concrete is 0.80 W/m-C° and the thermal conductivity of wood is 0.10 W/m-C°
How thick would a solid concrete wall have to be in order to have the same rate of flow through it as an 8.0 cm thick wall made of solid wood? (Assume both walls have the same surface area.)
64. cm
Physics & Space Science
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Swidden agriculture typically gives yields that are much higher than those in developed countries
What will be an ideal response?
Physics & Space Science
A 4.0-kg mass is placed at (3.0, 4.0) m, and a 7.0 kg-mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the z axis?
a. 275 kg•m2 c. 250 kg•m2 b. 90 kg•m2 d. 180 kg•m2
Physics & Space Science
Heavy-water molecules have a mass number of
A) 18. B) 3. C) 12. D) 10. E) 20.
Physics & Space Science
In the context of excited atoms, briefly explain ground state
What will be an ideal response?
Physics & Space Science