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Evaporation from a swimming pool

  • Thread starter jabbie3
  • Start date
  • #1
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Homework Statement



A) How much energy is required to evaporate all the water in a swimming pool of area 119 m2 and depth 2.4 m on a typical summer day? (Please note that the temperature of the water in the lake stays the same.) (For latent heat of vaporization use 2200 kJ/kg.)

B) The intensity of sunlight is about 1038 W/m2. If all the energy is absorbed by the water in the pool, how long will it take the water to evaporate?

Homework Equations



I got part A which is 628320000000 J. That is correct. It's part B that I cant solve.

I know I use I=Q/t and solve for t.

The Attempt at a Solution



When i solve for t I get 605317919.1 s.

Im pretty sure it is in seconds so I convert it to days and i get 7005.99 days.

THIS ISNT CORRECT!! IDK what im doing wrong..any guidance or input will be greatly appreciated.

THANKS!!:smile:
 

Answers and Replies

  • #2
532
2
I know I use I=Q/t and solve for t.
This is incorrect because it is the equation for electrical current. You are given the intensity I = 1038 W/(m^2). Look at the units. What terms are associated with "W" and "m^2"?
 

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