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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Transcribed Image Text:Read carefully the following selection then answer tihe questions that follow.
"Since ancient times, wind energy was converted by windmills into rotational kinetic 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 one second, a wind energy of 28800 J. It comverts 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 one second.
3. Knowing that the average consumption of electric energy by one house is 1080 J in one second, calculate the mumber 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.
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