Wind Energy Extraction Concepts

Wind Energy Extraction Concepts

Assessment

Interactive Video

Physics, Science

9th - 12th Grade

Hard

Created by

Amelia Wright

FREE Resource

The video explores the paradox of windmills, which extract kinetic energy from the wind while allowing it to pass. It explains the maximum energy extraction possible and the efficiency of windmills, highlighting that the most efficient windmill slows the wind to a third of its speed, achieving 59% efficiency. Real-world windmills are more complex, and the video also promotes additional content on Nebula and CuriosityStream.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main challenge in extracting energy from wind using windmills?

Extracting thermal energy from the wind

Extracting potential energy without affecting wind speed

Extracting kinetic energy while allowing wind to pass

Extracting chemical energy from the wind

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the maximum possible energy extracted from wind determined?

By the difference in chemical energy

By the difference in thermal energy

By the difference in kinetic energy

By the difference in potential energy

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the outgoing wind speed is half of the incoming speed, what fraction of the initial energy is extracted?

One half

One quarter

All of it

Three quarters

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the speed of the wind at the windmill if the final wind speed is half the incoming speed?

Three fourths the incoming speed

Half the incoming speed

Equal to the incoming speed

Double the incoming speed

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the overall efficiency of a windmill that slows the wind to a third of its incoming speed?

75%

59.259%

88.88%

56.25%

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the efficiency if a windmill slows the wind below 1/3 speed?

Efficiency increases

Efficiency becomes zero

Efficiency decreases

Efficiency remains the same

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the optimal wind speed reduction for maximum efficiency in energy extraction?

1/2 of the incoming speed

1/3 of the incoming speed

1/4 of the incoming speed

2/3 of the incoming speed

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