Wind Currents Due to Uneven Heating between the Equator and the Poles
A rubber suck...
Question
A rubber sucker, when pressed on a surface sticks to it. Which of the following factors is responsible for this?
A
Gravitational force
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B
Atmospheric pressure
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C
Glycerin
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D
Magnetic force
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Solution
The correct option is B Atmospheric pressure A rubber sucker, when pressed on a surface creates a partial vacuum as shown in the figure.
Once all the air is pushed out and a vacuum is created, the pressure exerted by the air outside is way more than the pressure inside, and hence it sticks to it.