##### A pond with a flat bottom has a surface area of 695 m2 and a depth of 2.5 m. On

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A pond with a flat bottom has a surface area of 695 m2 and a depth of 2.5 m. On a warm day, the surface water is at a temperature of 25°C, while the bottom of the pond is at 12°C. Find the rate at which energy is transferred by conduction from the surface to the bottom of the pond.

W
Jun 20th, 2015

Thank you for the opportunity to help you with your question!

The rate of cooling (as such by Newton) is given as = KA(t1 - t2)/d

where K= thermal conductivity
A = area of cross section
d = depth
t1-t2 = temperature difference

thermal conductivity  of water is 0.6 J/s · m · °C
therefore rate of cooling = 0.6*695*(25-12)/2.5 J/s

therefore rate of cooling = 417 *13 / 2.5 = 2147.6 J/s
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Jun 20th, 2015

wrong

Jun 20th, 2015

the answer is 2168.4 J/s

sorry for calculation mistake

Jun 20th, 2015

the unit is wrong

Jun 20th, 2015

it is correct thanks

Jun 20th, 2015

thanks rate me if you can

Jun 20th, 2015

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Jun 20th, 2015
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Jun 20th, 2015
Dec 4th, 2016
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