Suppose that in a lightning flash the potential difference between a cloud and the ground is 1.0*109 V and the quantity of charge of the cha

Question

Suppose that in a lightning flash the potential difference between a cloud and the ground is 1.0*109 V and the quantity of charge of the charge transferred I s30 C? (a )What is the charge in energy of that transferred charge? (b) If all the energy released could be used to accelerate a 1000kg car from rest. What would be its final speed?

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Hải Đăng 4 years 2021-09-02T02:30:49+00:00 1 Answers 5 views 0

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  1. thongdat2
    0
    2021-09-02T02:32:28+00:00
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    Answer:

    a) U_{e} = 3 \times 10^{10}\,J, b) v \approx 7745.967\,\frac{m}{s}

    Explanation:

    a) The potential energy is:

    U_{e} = Q \cdot \Delta V

    U_{e} = (30\,C)\cdot (1.0\times 10^{9}\,V)

    U_{e} = 3 \times 10^{10}\,J

    b) Maximum final speed:

    U_{e} = \frac{1}{2}\cdot m \cdot v^{2}\\v = \sqrt{\frac{2\cdot U_{e}}{m} }

    The final speed is:

    v=\sqrt{\frac{2\cdot (3 \times 10^{10}\,J)}{1000\,kg} }

    v \approx 7745.967\,\frac{m}{s}

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