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Renewable Energy Practice Test: Solar Day Length
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Avg score: 74% • Most missed: “The length of mean solar day is slowly increasing.”

On Earth, a solar day is around 24 hours. However, Earth's orbit is elliptical, meaning it's not a perfect circle. That means some solar days on Earth are a few minutes longer than 24 hours and some are a few minutes shorter.

Related: Renewable Energy Practice Test: Solar Time (Locał Apparent Time) 

Renewable Energy Practice Test: Solar Day Length
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10 Questions

1. Solar day is ______ sidereal day.
2. Which of the following solar time duration is not constant throughout the year?
3. What is a solar day?
4. What is a sidereal day?
5. What is local true solar time?
6. What is solar noon?
7. How does the solar noon vary with every 15 degrees of longitude east of a given longitude?
8. One sidereal day is ______ solar hours and ______ solar minutes long.
9. How does the solar noon vary with every 15 degrees of longitude west of a given longitude?
10. The length of mean solar day is slowly increasing.

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