A charge of Q creates an electric field of E= 100 N/C at a distance of r = 0.1 m. If two charges Q1 = 1.4Q and Q2 = -1.6Q  are separated by a distance of ℓ=0.5 meters, what is the magnitude of the electric field at point P that is at the middle of the charges? Express your answer with one decimal point in units of N/C.

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A charge of Q creates an electric field of E= 100 N/C at a distance of r = 0.1 m. If two charges Q= 1.4Q and Q2 = -1.6Q  are separated by a distance of ℓ=0.5 meters, what is the magnitude of the electric field at point P that is at the middle of the charges? Express your answer with one decimal point in units of N/C.

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