An electric Kettle is rated at 25 W. Calculate the quantity of heat generated in 2s

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An electric Kettle is rated at 25 W. Calculate the quantity of heat generated in 2s

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Đan Thu 3 years 2021-08-11T18:27:46+00:00 1 Answers 35 views 0

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  1. Bo
    0
    2021-08-11T18:28:47+00:00
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    Answer:

    Energy consumed by the electric kettle in 9.5 min =Pt=(2.5×10

    3

    )×(9.5×60)=14.25×10

    5

    J

    Energy usefully consumed =msΔT=3×(4.2×10

    3

    )×(100−15)=10.71×10

    5

    where s=4.2J/g

    o

    C= specific heat of water and boiling point temp=100

    o

    C

    Heat lost =14.25×10

    5

    −10.71×10

    5

    =3.54×10

    5

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