Two tiny particles having charges 20.0 μc and 8.00 μc are separated by a distance of 20.0 cm what are the magnitude and direction of electric field midway between these two charges? (k = 1/4πε0 = 9.0 × 109 n • m2/c2)

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air