In doing a load of clothes, a clothes dryer uses 16 A of current at 240 V for 45 min. A personal computer, in contrast, uses 2.7 A of curren

Question

In doing a load of clothes, a clothes dryer uses 16 A of current at 240 V for 45 min. A personal computer, in contrast, uses 2.7 A of current at 120 V. With the energy used by the clothes dryer, how long (in hours) could you use this computer to “surf” the internet?

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Khang Minh 2 months 2021-07-29T21:30:50+00:00 1 Answers 2 views 0

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    2021-07-29T21:32:00+00:00

    Explanation:

    Given that,

    Current of clothes dryer, I = 16 A

    Voltage, V = 240 V

    Time, t = 45 min = 2700 s

    Current of personal computer, I’ = 2.7 A

    Voltage, V’ = 120 C

    Energy used by clothes dryer is given by :

    E=I^2Rt\\\\E=IVt\\\\E=16\times 240\times 2700\\E=1.03\times 10^7\ J

    Let t’ is the time for this computer to “surf” the internet. Again using formula of energy used as :

    E=I'V't'\\\\t'=\dfrac{E}{I'V'}\\\\t'=\dfrac{1.03\times 10^7}{2.7\times 120}\\\\t'=31790.12\ s\\\\t'=8.83\ h

    So, for 8.83 hours you could use this computer to “surf” the internet.

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