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notsponge [240]
3 years ago
10

A charge of 0.20uC is 30cm from a point charge of 3.0uC in vacuum. what work is required to bring the 0.2uC charge 18cm closer t

o the 3.0uC charge?​
Physics
1 answer:
vlada-n [284]3 years ago
3 0

Answer:

The correct answer is "4.49\times 10^{10} \ joules".

Explanation:

According to the question,

The work will be:

⇒ Work=-\frac{kQq}{R}

              =-\frac{1}{4 \pi \varepsilon \times (18-30)\times 3\times 0.2}

              =-\frac{1}{4 \pi \varepsilon \times (-12)\times 3\times 0.2}

              =\frac{0.3978}{\varepsilon }

              =4.49\times 10^{10} \ joules

Thus the above is the correct answer.    

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A simple pendulum consisting of a bob of mass m attached to a string of length L swings with a period T on Earth. Calculate the
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If the mass is displaced 0.270 m from equilibrium and released, what is its speed when it is 0.130 m from equilibrium?
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The speed is 1.52 m.

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