{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

solution-hw11 - lai(yl8859 HW11 Ross(15200 This print-out...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
lai (yl8859) – HW11 – Ross – (15200) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Water flows over Victoria Falls, which is 128 m high, at an average rate of 1 . 56 × 10 6 kg/s. The acceleration of gravity is 9 . 81 m / s 2 . If half the potential energy of this water were converted into electric energy, how much power would be produced by these falls? Correct answer: 979 . 43 MW. Explanation: Let : Δ m Δ t = 1 . 56 × 10 6 kg / s , h = 128 m m , and g = 9 . 81 m / s 2 . P = Δ W Δ t = - Δ U Δ t = - 1 2 Δ( mg h ) Δ t = - 1 2 g h Δ m Δ t = - 1 2 (9 . 81 m / s 2 ) ( - 128 m) × (1 . 56 × 10 6 kg / s) · MW 10 6 W = 979 . 43 MW . 002 (part 1 of 2) 10.0 points A bead slides without friction around a loop- the-loop. The bead is released from a height 9 m from the bottom of the loop-the-loop which has a radius 3 m. The acceleration of gravity is 9 . 8 m / s 2 . 9 m 3 m A What is its speed at point A ?
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern