Acabin has a 0.159-m thick wooden floor [k = 0.141 w/(m · c°)] with an area of 13.4 m2. a roaring fire keeps the interior of the cabin at a comfortable 18.0 °c while the air temperature in the crawl space below the cabin is –16.4°c. what is the rate of heat conduction through the wooden floor?

[/tex] 408.8[/tex]

Explanation:

= thickness of the floor = 0.159 m

= thermal conductivity of wooden floor = 0.141 Wm⁻¹ ⁰C⁻¹

= Temperature of the interior of the cabin = 18.0 ⁰C

= Temperature of the air below the cabin = - 16.4 ⁰C

Difference in temperature is given as

= Difference in temperature = ⁰C

= Area of the floor = 13.4 m²

= Rate of heat conduction

Rate of heat conduction is given as

W

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

-first use of geothermal energy occurred more than 10,000 years ago in north america by american paleo-indians

-the first industrial use of geothermal energy began near pisa, italy in late 18th century

-in 1904, italian scientist piero ginori conti invented the first geothermal electric power plant in which steam was used to generate the power

-with the above experiment, the first geothermal plant in usa started in 1922 with a capacity of 250 kilowatts

-however, in 1946 first ground-source geothermal heat pump installed at commonwealth building in portland, oregon

-during the 1960’s, pacific gas and electric began operation of first large scale geothermal power plant in san francisco, producing 11 megawatts

-in 1973, when oil crisis began many countries began looking for renewable energy sources and by 1980’s geothermal heat pumps (ghp) started gaining popularity in order to reduce heating and cooling costs

-as effect of climate change started showing results, governments of various countries joined hands to fight against it, for which kyoto protocol was signed in japan in 1997, laid out emission targets for rich countries and required that they transfer funds and technology to developing countries, 184 countries have ratified it

hope this