Asmall plastic sphere with a charge of -6.0 nc is near another small plastic sphere with a charge of -14 nc . if the spheres repel one another with a force of magnitude 8.3×10−4 n , what is the distance between the spheres?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg.how much energy e must be supplied to the device? express your answer in joules.