At 18,000 feet, atmospheric pressure is about half of what it is at sea level. thus, i would suspect that at 36,000 feet atmospheric pressure would be zero. however, this isn't the case. atmospheric pressure doesn't reach zero until infinity (for a lack of shortening this paragraph). in other words, an infinite number of feet above sea level. that's a lot farther than 36,000 feet. how is this possible?

Step-by-step explanation:

At 18,000 feet, atmospheric pressure is about half of what it is at sea level. Thus, I would suspect that at 36,000 feet atmospheric pressure would be zero. However, this isn't the case. Atmospheric pressure doesn't reach zero until infinity (for a lack of shortening this paragraph). In other words, an infinite number of feet above sea level. That's a lot farther than 36,000 feet. How is this possible?

the bottom of the spinner is not flat.

step-by-step explanation: