William Thomson tells of running into Joule in 1847 at Mont Blanc; Joule had with him his bride and a long thermometer with which he was going to "try for elevation of temperature in waterfalls." The Horseshoe Falls at Niagara is 167 ft high and has a summer daytime flow rate of 2.55 x 106 L/s. If we assume all the energy due to falling is converted to heat, compute the maximum temperature difference between the water at the top and bottom of the falls. b. Using a flow rate of 2.55 x 10° L/s, compute the maximum power in watts that could be generated. It is, perhaps, interesting to note that the power generated from hydroelectric plants on the Niagara River is 4.4 gigawatts. a.

William Thomson tells of running into Joule in 1847 at Mont Blanc; Joule had with him his bride and a long thermometer with which he was going to "try for elevation of temperature in waterfalls." The Horseshoe Falls at Niagara is 167 ft high and has a summer daytime flow rate of 2.55 x 106 L/s. If we assume all the energy due to falling is converted to heat, compute the maximum temperature difference between the water at the top and bottom of the falls. b. Using a flow rate of 2.55 x 10° L/s, compute the maximum power in watts that could be generated. It is, perhaps, interesting to note that the power generated from hydroelectric plants on the Niagara River is 4.4 gigawatts. a.