A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

pythagoras123

  • one year ago

A windmill is used to raise water from a well. The depth of the well is 5.0 m. The windmill raises 204 kg of water every day. What is the average useful power extracted from the wind? A. 12 mW B. 120 mW C. 690 mW D. 1700 mW

  • This Question is Open
  1. Michele_Laino
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    The requested average power P, is given by the subsequent formula: \[\Large P = \frac{{mgh}}{{\Delta t}}\] where m is the mass of water, h is the depth of the well, g is gravity, and \Delta t are the seconds contained in 1 day In that way the power will be measured in watt

  2. pythagoras123
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I got 204 x 9.81 x 5 = 10006.2 kJ Power = 10006.2 kJ / 1 = 10006.2 kW = 10.0062 mW which doesn't fall under any of the options. Did I misinterpret something here

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    First of all it will be joules not kilo joules secondly you are given the time as 1 day not 1 second \[\Delta t=1day=24\times60\times60 seconds\]

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[P=\frac{10006.2}{24\times60\times60} Watt\]

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

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.