Explain why an astronaut "must work hard to open their mouths" while in space but an elderly person asleep in a chair, for example, has their mouth open.

Name: Explain why an astronaut "must work hard to open their mouths" while in space but an elderly person asleep in a chair, for example, has their mouth open.
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The Answer of Explain why an astronaut "must work hard to open their mouths" while in space but an elderly person asleep in a chair, for example, has their mouth open.

Explain Why an Astronaut "Must Work Hard to Open Their