Question

Why the size of an air bubble increases as it rises from bottom to the top of a lake ?

Answer 1

Answer:

air bubble experiences the pressure of column of water in lake

when it tries to come up pressure becomes less and it collects the near by air

and becomes big

therefore

the size of an air bubble increases as it rises

from bottom to the top of a lake

Explanation:

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Answer 2

Answer:

When the bubble is at the bottom of lake, total pressure exerted on it due to water column and  

atmosphere is high. As it rises up total pressure decreases and hence its size increases.