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Aleksandr [31]
3 years ago
5

Three equal point charges, each with charge 2.00 μC , are placed at the vertices of an equilateral triangle whose sides are of l

ength 0.250 m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.) U = nothing J
Physics
1 answer:
oksano4ka [1.4K]3 years ago
4 0

Answer:

Explanation:

Energy of system of charges

= k q₁q₂ / r₁₂ + k q₁q₃ / r₁₃ + k q₃q₂ / r₃₂

q₁ , q₂ and q₃ are charges and  r₁₂ , r₁₃ , r₃₂ are densities between them

9 x 10⁹ ( 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 + 2x2 x10⁻¹²/ .25 )

= 9 x 10⁹  x 3 x 16 x 10⁻¹²

= 432 x 10⁻³

= .432 J .

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Answer:

<h2>The answer is  planetary motion</h2>

Explanation:

According to Johannes Kepler, the laws governing planetary motion

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2. A line segment joining a planet and the Sun sweeps out equal areas          

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a   c

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What travels around the earth but stays in one spot?
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Earth's magnetic field is generated by
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Read 2 more answers
A string, 30 cm long and having a mass of 45 g, is attached to a 810 Hz oscillator at one end. The other end of the string is fi
Karolina [17]

Answer:

870 N

Explanation:

The expression for velocity of wave in a string is given below

v = \sqrt{\frac{T}{m} }  , T is tension and m is mass per unit length .

m = 45 x 10⁻³ / 30 x 10⁻²

= .15 kg/m

Putting the given values in the equation

76 = \sqrt{\frac{T}{.15} }

T = 76² x .15

= 866.4

870 N  approx.

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2 years ago
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