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1 A wind turbine has blades, which sweep out an area of diameter 25 m. 25 m blades ago Fig. 5.1 (a) The wind is blowing
Posted: Sun Apr 17, 2022 3:53 pm
by answerhappygod
- 1 A Wind Turbine Has Blades Which Sweep Out An Area Of Diameter 25 M 25 M Blades Ago Fig 5 1 A The Wind Is Blowing 1 (31.88 KiB) Viewed 60 times
1 A wind turbine has blades, which sweep out an area of diameter 25 m. 25 m blades ago Fig. 5.1 (a) The wind is blowing directly towards the wind turbine at a speed of 12 m/s. At this wind speed, 7500 kg of air passes every second through the circular area swept out by the blades. (1) Calculate the kinetic energy of the air travelling at 12m/s, which passes through the circular area in 1 second. kinetic energy [3] (ii) The turbine converts 10% of the kinetic energy of the wind to electrical energy. Calculate the electrical power output of the turbine. State any equation that you use.
(b) On another day, the wind speed is half that in (a). (0) Calculate the mass of air passing through the circular area per second on this day. mass [1] (i) Calculate the power output of the wind turbine on the second day as a fraction of that on the first day. fraction = [3] [Total: 10]