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Question

Which of the following enables us to drink a liquid through a straw?

A
Humidity
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B
Temperature
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C
Atmospheric pressure
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D
Composition of air
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Solution

The correct option is C Atmospheric pressure
When a straw is used for drinking, the air is expelled out from the straw. That is why there is a decrease in the air pressure inside the straw. This makes the liquid in the container to enter the straw, rise and come out of the straw. Thus, we can drink the juice/liquid using a straw.

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