Why Is It So Difficult to Remove the Lid from a Vacuum-

question 31

Multiple Choice

Why is it so difficult to remove the lid from a vacuum- sealed jar?

• A) The vacuum inside the jar pulls inward on the lid, holding it firmly to the jar.
• B) The air pressure inside the jar pushes upward on the lid more strongly than the air pressure outside pushes downward on the lid.
• C) The higher pressure inside the jar pulls inward on the lid, holding it firmly to the jar.
• D) The vacuum inside the jar pushes outward on the lid, holding it firmly to the jar.
• E) The air pressure outside the jar pushes downward on the lid more strongly than the air pressure inside pushes upward on the lid.

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Definitions:

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The sense of duty or obligation that comes from having been in situations where one had to take charge or make decisions.

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