# Physics

posted by .

How much work must be done to bring three electrons from a great distance apart to within 2.1Ã—10âˆ’10 {\rm m} from one another (at the corners of an equilateral triangle)?

• Physics -

Let a be the separation. I do not understand your 1Ã—10âˆ’10 {\rm } notation for a

Bringing in the first electron requires no work.
Bringing in the second electron required k^e^2/a

Bringing in the third electron requires
2ke^2/a

The total work required is
3 k e^2/a

k is the Coulomb constanmt

## Similar Questions

1. ### Physics

How much work must be done to bring three electrons from a great distance apart to 1.0 * 10^(-10)m from one another (at the corners of an equilateral triangle)?
2. ### Physics

three identical 2*`0^-5C point charges are placed a the corners of an equilateral triangle pf sodes 1m. The triangle has one apex C pointing up the page and 2 base angles A and B. Deduce the magnitude and direction of the force acting …
3. ### physics

How much work must be done to bring three electrons from a great distance apart to 5.5×10−10 m
4. ### physics

The physics of electric potential energy at one corner of a triangle. Two charges, q1 = +5.0 ìC and q2 = -2.0 ìC are 0.50 m apart. A third charge, q3 = +6.0 ìC is brought from infinity to a spot 0.50 m from both charges so that …
5. ### physics

An equilateral triangle with sides 2 m each has a charge of 30 μC at each of its three corners. Determine the electric field at a point 5 m above the center of the triangle.
6. ### General Physics II

___A __/__\ B/____\C radius (each side of this equilateral triangle) 0.5 m Three point charges are located at the corners of an equilateral triangle as in the figure below. Find the magnitude and direction (counterclockwise from the …
7. ### science

how much work is done in bringing three electrons , which are intially a great disance apart to how fats will it be moving then it is at distance ?
8. ### physics

three point charges-1*10^-6,-2*10^-6,3*10^-6.one kept at corners of an equilateral triangle of side 1m.what is potential at centre
9. ### physics

Three equal positive point charges q are at the corners of an equilateral triangle with sides of length a. What is the magnitude and direction of the electric field at one corner of the triangle due to two charges placed on another …
10. ### Physics

We study the three point charges shown in the figure. They are held at the corners of an equilateral triangle with ℓ = 0.9 m. What is the electric potential energy of the system of three point charges?

More Similar Questions