A +15 nC point charge is placed on the x axis at x = 1.5 m, and a -20 nC charge is placed on the y axis at y = -2.0m. What is the magnitude of the electric field at the origin?

Explanation:

Given

First charge of is placed at

Second charge   is placed at

Electric field is given by

Electric field due to is away from it

Electric field due to

Net electric field will be vector addition of two

Magnitude of Electric field is

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .

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