3000 liters of water falls from a height of 150 m at a dam where the efficieny of the turbine is 65%. How much electricty is generated ?
1 Answer | Add Yours
At the dam, water falls from a height of 150 m on a turbine with an efficiency of 65%. This implies that 65% of the gravitational potential energy stored in the water is converted to electrical energy.
The gravitational potential energy of an object with mass m at a height h is equal to E = m*g*h. The mass of 3000 liters of water is 3000*1 = 3000 kg. At a height of 150 m, the potential energy is 3000*150*9.8 = 4410 kJ
The turbine can convert 65% of this to electrical energy. The electrical output is 2866500 J
When 3000 l of water falls from a height of 150 m a turbine with efficiency 65% produces 2866500 J of electrical energy.
Join to answer this question
Join a community of thousands of dedicated teachers and students.Join eNotes