Read carefully the following selection then answer the questions that follow. "Sunce ancient times, wind energy was converted by windmls into rotational kzinetic energy in order to grind grain. It was used to raise water from a well. Nowadays, wind energy is also converted into electric energy by aero-generators (nubines). An aero-generator receives, in cne second, a wind energy of 28800 J. It converts 30 % of this energy into electric energy". Questions 1. Give the names of two energy conversions mentioned in the text. 2. Determine the amount of electric energy produced by the aero-generator in cne second. 3. Knowing that the avernge consumption of electric energy by one house is 108O J in one second, calculate the muanber of houses whose need for electric energy can be provided by this aero-generator. 4. a) When the speed of wind decreases, the above aero-generator can no more provide the same amount of electric energy needed. Why? b) What is then the disadvantage of this wind energy? 5. Give two advantages of the wind energy.

Read carefully the following selection then answer the questions that follow. "Sunce ancient times, wind energy was converted by windmls into rotational kzinetic energy in order to grind grain. It was used to raise water from a well. Nowadays, wind energy is also converted into electric energy by aero-generators (nubines). An aero-generator receives, in cne second, a wind energy of 28800 J. It converts 30 % of this energy into electric energy". Questions 1. Give the names of two energy conversions mentioned in the text. 2. Determine the amount of electric energy produced by the aero-generator in cne second. 3. Knowing that the avernge consumption of electric energy by one house is 108O J in one second, calculate the muanber of houses whose need for electric energy can be provided by this aero-generator. 4. a) When the speed of wind decreases, the above aero-generator can no more provide the same amount of electric energy needed. Why? b) What is then the disadvantage of this wind energy? 5. Give two advantages of the wind energy.

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter10: Work, Energy And Machines

Section10.2: Machines

Problem 28PP

See similar textbooks

Similar questions

What energy transformations occur during the process of drawing a bow and letting the arrow fly through the air and landing?
Which statement best describes the energy transformation?
A challenge gaining prominence throughout the planet is the increased need for "green" or sustainable energy. In certain parts of the country, wind farms are a viable alternative to conventional energy sources. An average wind turbine, the device which converts rotational motion to electricity, has a maximum capacity of 2.00 MW . However, the wind turbine realistically never runs at full power. If a wind turbine runs at 31.0% capacity for 1.00 year , how much energy does the wind turbine generate?
I need help with this , need to show units and all of the work
How do pole vaulters utilise energy transformation?
Please solve this question with all parts answered and all work shown with the indicated answers next to the indicated part.
A typical wind turbine extracts 40% of the kinetic energy of the wind that blows through the area swept by the blades. For a large turbine, 120,000 kg of air moves past the blades at 16 m/s every second. If the wind turbine extracts 40% of this kinetic energy, and if 80% of this energy is converted to electric energy, what is the power output of the generator?
Why is it important to reduce friction on compound machines?
Energy transformed from one form to another with some loss. True or false.
Describe how the energy of an arrow is transformed from one form to another as the bow is drawn, the arrow leaves the bow, travels through the air, and comes to rest in the target.
What is irreversible head loss? How is it related to the mechanical energy loss?
What is another name for energy of motion? A) Motional energy B) Potential energy C) Kinetic energy D) Rotational energy