How high is a wind turbine?

Grade level: 5 – 6th grades

Skills: Radius, diameter, circumference & area of a circle

Related environmental issues: Energy

The average hub height of a wind turbine installed in the United States during 2015 was 82 meters. And The average rotor diameter of a wind turbine installed during the same year was 102 meters. What is the average overall height of a wind turbine installed during 2015?

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Source: U.S. Department of Energy, 2016. 2015 Wind Technologies Market Report

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Answer keys

133 meters

102/2=51

51+82=133

How big is a wind turbine?

Grade level: 5 – 6th grades

Skills: Radius, diameter, circumference & area of a circle

Related environmental issues: Energy

The size of wind turbine has been getting larger to generate electricity from wind more efficiently.  About 75% of the wind turbines built in 2014 in the United States had a rotor diameter of 100 meters. “100 meters” is about the same as the length of a Football Pitch.

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  1. What is the radius?

  2. What is the circumference?

  3. What is the area?

Source: American Wind Energy Association,  Market Report

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Answer keys

1.  50 meters (100/2 = 50)

2.100π m(2 x π x 50 = 100π)

3.  2,500π m2 (π x 50 x 50 = 2,500π)