An electric heater is tested by immersing it in 0.500 kg of water and measuring the time ∆t it takes to raise the water temperature by 10.0°C. The experiment is repeated for different currents I through the heater, and the results are tabulated below. Determine two quantities, based on heating time and current, which, when plotted, will give a straight line. Make your plot, determine a best-fit line, and use it to find the heater’s resistance. Hint: You may need to consult Chapter 16.