1.How would I calculate the electric field strength midway between two 3.0 uc objects if they are 90 cm apart?

2. How would I calculate the electric field strength midway between a 4.50 uC charged object and a -4.50uC charged object if the two charges are 50 cm apart?

3. What is the electric field strength at a point in space where an electron experiences an initial acceleration of 7.50×10^12 m/s^2?

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