Two charges are located on the positive − of a coordinate system. Charge 1 = 2 × 10 -9 C is 2 from the origin, and charge 2 = 3 × 10 -9 4 from the origin. What is the magnitude of the total force exerted by these two charges on a charge 3 = 5 × 10-9 located at the origin?

6–48 bananas are to be cooled from 24 to 138c at a rate of 215 kg/h by a refrigeration system. the power input to the refrigerator is 1.4 kw. determine the rate of cooling, in kj/ min, and the cop of the refrigerator. the specific heat of banana above freezing is 3.35 kj/kg·8c.