Multiple choice

What constant temperature is maintained at 11 km to 20 km from Earth's surface?

  1. -56.5 C

  2. -45.6 C

  3. -32.9 C

  4. None of these
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A Correct answer
Explanation

At 11-20 km altitude in the standard atmosphere, a constant temperature of -56.5°C is maintained. This is the isothermal layer in the lower stratosphere, beginning at the tropopause. The temperature remains nearly constant through this altitude range.

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