Science Questions

Qu. 2 As the air is pumped out of the bell jar; the balloon inflates because the pressure of the air outside the balloon decreases, allowing the air inside the balloon to expand to fill the space left by the air which has been withdrawn.

Qu. 3 The balloon became round because the air pressure outside the balloon decreased and the air pressure needed to inflate the balloon is proportional to its surface area, which is at its minimum when the balloon is in the shape of a sphere (Sullivan). Less pressure is needed to inflate the balloon when it takes on this shape.

Qu. 4 As air re-enters the bell jar, the air pressure on the outside of the balloon begins to rise and exert pressure on the balloon. This continues until the pressure inside the balloon equals the pressure outside the balloon. The only way for this to happen is if the air inside the balloon contracts, and as this happens, the balloon will

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Some common words found in the essay are:
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Approximate Word count = 1021
Approximate Pages = 4 (250 words per page)

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