Anonymous
Anonymous asked in Science & MathematicsPhysics · 2 months ago

how to solve ?

The Joule and the kilowatt-hour are both

units of energy.

18.4 kW · h is equivalent to how many

Joules?

Answer in units of J

3 Answers

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  • MyRank
    Lv 6
    3 weeks ago

    Given,

    Power (P) = 18.4 k watts.hour

    = 18.4 x 10³ watts.hour

    = 18.4 x 10³J/sec hour

    = 18.4 x 10³J /sec x 1hour / 1hour = 3600sec

    = 18.4 x 10³ x 3600 = 66.24 x 10⁶J

    = 66.24MJ.

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  • 2 months ago

    18.4kW = 18.4e3 W = 18,400 J/s

    18,400 J/s * 1hr *3600s/hr = 66,240,000 J <<<<

    = 66.2MJ

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  • Mangal
    Lv 4
    2 months ago

    Watt (W) is nothing but Joule per second (J/s)

    So Joule (J) is same as Watt.second (Ws)

    1 Ws = 1 J

    (1 W) (1 s) = 1 J

    (1 W) (1/3600 h) = 1 J

    1 Wh = 3600 J

    1 kWh = 3600 kJ (kilo Joule)

    .......... = 3.6 MJ (mega Joule)

    ........... = 3.6 X 10^6 J

    ===========================

    18.4 kWh = 18.4 X 3.6 X 10^6 J

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