[填空题]
Water is stored in an artificial lakepp q /cd3j7f3r created by a dam (Fig. 15–27). Tw5 a 1p1qlx/bc0xcr9mhe water depth is 45 m at the dam, and a steady c5b1pw0c 9xr 1/xlm qaflow rate of $35m^3/s$ is maintained through hydroelectric turbines installed near the base of the dam. How much electrical power can be produced? $ \times10^{7 }W$
