Water is allowed to pass through a tidal barrage until the tide is at its highest. The barrage is then closed, and the tide beyond the barrage lowers, while the water behind it stays at the same height. The water behind the barrage is then allowed to flow back through the turbines into the sea.
If the mass of the extra water held back by the barrage is kg, and it has an average height of 1.5 m above the water in the sea beyond the barrage, what is the gravitational potential energy of the water held back by the barrage? Use a value of 9.8 m/s2 for the acceleration due to gravity.
A proposed tidal barrage power station has an expected maximum power output of 950 MW. If the tidal barrage has 38 turbines, what is the maximum power output of each turbine?
What type of electric current do the turbines in a tidal barrage produce?
Which of the following statements correctly describe the disadvantages of building a tidal barrage?
Which of the following statements correctly describe the advantages of building a tidal barrage?