anonymous
  • anonymous
A dam produces 250W/m^2 of electricity. It composed of 7x10^9kg of concrete. Concrete requires 1MJ of energy to produce per kg. How much energy did it take to produce the dam? How long is the 'energy payback time" for the dam?
Mathematics
jamiebookeater
  • jamiebookeater
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your free account and access expert answers to this
and thousands of other questions

anonymous
  • anonymous
a) 7*10^9 MJ b) 7*10^9*10^6/(250*A*3600*24) days ... here A is the area of the dam in m^2
anonymous
  • anonymous
But the area of the dam is not given, how should i calculate it?
anonymous
  • anonymous
well then take it as 1 ... though area of the dam should be given ...

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
Ok, well the second part of the question the area was given which is 274mi^2 and the efficiency is 12%.... back to the question a would be answer for the energy right?? Thanks so much Shaan!

Looking for something else?

Not the answer you are looking for? Search for more explanations.