Considera que en tu casa tienes un televisor de 110 W, si pasa encendido 4 horas diarias, Cuál será la energía consumida durante un mes (30

Question

Considera que en tu casa tienes un televisor de 110 W, si pasa encendido 4 horas diarias, Cuál será la energía consumida durante un mes (30 días). ¿Cuál es el costo de funcionamiento si el precio de kWh es de 9 centavos

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Ngọc Khuê 5 months 2021-09-01T10:48:54+00:00 2 Answers 0 views 0

Answers ( )

  1. danthu
    0
    2021-09-01T10:50:31+00:00
    Reply

    Answer:

     E = 13.2 kWh

    ,     Cost = $ 10.8

    Explanation:

    We can look for the consumed energy from the expression of the power

          P = W / t

    The work is equal to the variation of the kinetic energy, for which

           P = E / t

           E = P t

           

    look for the energy consumed in one day and multiply by the days of the month in the month

          E = 110 4 30

          E = 13200 W h

           E = 13.2 kWh

    the cost of this energy is

        Cost = 0.9 12

        Cost = $ 10.8

  2. Nem
    0
    2021-09-01T10:50:48+00:00
    Reply

    Answer:

    a) 13.2kWh

    b) 118800 cents

    Explanation:

    (a) To find the energy consumed during one month you use the following formula:

    E=Pt    (1)

    E: energy consumed

    P: power of the tv (energy consumed per hour) = 110 W

    t: time

    The tv is on for four hours per day. You first calculate the number of hours, in which the tv is on, for one month:

    t=4\frac{h}{day}*\frac{30day}{1month}=120\frac{h}{month}

    Then, the tv is on 120 h on a month.

    Next, you replace the values of P ant t in the equation (1) for E:

    E=(110W)(120h)=13200Wh=13.2\ kWh

    (b) If the price for kWh is 9 cents you have for the tv:

    COST=13.2kWh*\frac{9cents}{1kWh}=118800\ cents

    hence, the cost of the energy consumed  by the  tv is 118800 cents in on month

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