The height of the dam, in an hydroelectric power station is 10 m. In order to generate 1 MW of electric power, the mass of water (in kg) that must fall per second on the blades of the turbine is

The height of the dam, in an hydroelectric power station is 10 m. In o

1.	The height of the dam, in an hydroelectric power station is 10 m. In order to generate 1 MW of electric power, the mass of water (in kg) that must fall per second on the blades of the turbine is
Answer» `10^6` `10^5` `10^3` `10^4` Solution :Let `(dm)/(dt)` be the mass of water falling per second. As `mgh =` work DONE `:. (dm)/(dt) gh = `POWER Given `h = 10 m` `:. (dm)/(dt) = (1 XX 10^6 W)/(10 MS^(-2) xx 10 m) = 10^4 kg s^(-1).`