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A polar jet is a belt of winds about 600 miles wide, flowing as fast as _________ in its central "core".

A. 37 mph
B. 370 mph
C. 3700 mph
D. the speed of sound
E. an orbiting satellite

Answer :

Final answer:

The correct answer is B. 370 mph, which corresponds to the speed of jet streams in Earth's upper atmosphere. They are fast-moving but not as fast as supersonic speeds or the speed of orbiting satellites.

Explanation:

A polar jet is a belt of winds about 600 miles wide, with wind speeds that can vary greatly depending on the specific circumstances and location. However, in general, these jet streams on Earth can have wind speeds of around 90 meters per second, which is equivalent to about 300 kilometers per hour or 186 miles per hour. When considering the central "core" of a polar jet, the most suitable answer from the options provided is B. 370 mph. This speed is consistent with the high-speed upper atmosphere winds mentioned, but significantly lower than supersonic or orbital speeds.

It is important to note that while the jet streams on Earth can reach very high speeds, they do not approach the extreme speeds found in the jet streams on other planets like Neptune, where equatorial jet streams can even approach supersonic speeds (faster than the speed of sound in Neptune's air), which can exceed 2100 kilometers per hour.

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