Water flows over a section of Niagara Falls at a rate of 1.31 × 106 kg/s and falls 71 m. The acceleration of gravity is 9.8 m/s 2 . How many

Question

Water flows over a section of Niagara Falls at a rate of 1.31 × 106 kg/s and falls 71 m. The acceleration of gravity is 9.8 m/s 2 . How many 40 W bulbs can be lit with this power?

in progress 0
Diễm Kiều 4 years 2021-08-24T14:52:58+00:00 1 Answers 11 views 0

Answers ( )

  1. ThanhThu
    0
    2021-08-24T14:54:18+00:00
    Reply

    Answer:

    2×10⁷ bulbs.

    Explanation:

    From the question,

    The the power generated by the water flows over a Niagara section is given as,

    P = M’gh……………………. Equation 1

    Where M’ = Fall rate, g = acceleration due to gravity, h = height of fall.

    Given: M’ = 1.31×10⁶ kg/s, g = 9.8 m/s², h = 71 m

    Substitute into equation 1

    P = 1.31×10⁶×9.8×71

    P = 9.115×10⁸ W.

    Number of 40 W bulb it can lit = P/40

    = 9.115×10⁸/40 = 2.27×10⁷ ≈ 2×10⁷ bulbs.

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )