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## Homework Statement

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Two point-like charges are placed as shown in the figure, r1 = 28.0 cm and r2 = 56.0 cm. Find the magnitude of the electric field at point (p) shown in the figure. Let q1 = −13.0 µC, q2 = +30.0 µC.

## Homework Equations

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E1 = k*q1 / r^2

3. The Attempt at a Solution

3. The Attempt at a Solution

The electrical field at the two points are the sum of the two electric fields of q1 and q2.

E = E1 + E2

The equation for E1 is:

E1 = k*q1 / r^2

Plugging in the known quantities:

E1 = 8.99x10^9 *13 x10^-6 / 0.28^2

So E1 equals

E1 = 1492068.776 N/C

The same process goes for E2:

E2 = 8.99x10^9 * 30 x10^-6 / 0.56^2

So E2 equals:

E2 = 860012.75521 N/C

Now adding up E1 and E1 we get:

E = (1492.34 + 860.96) x10^3

E = 2350701.531 N/C

I am not sure if my reasoning is correct, if anyone can help it'll be much appreciated, thank you!