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.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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