# A glass tube of uniform internal radius(r) has a valve separating the two identical ends. Intially, the valve is in a tightly closed position. End 1 h

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A glass tube of uniform internal radius(r) has a valve separating the two identical ends. Intially, the valve is in a tightly closed position. End 1 has a hemispherical soap bubble or radius r. End 2 has sub-hemispherical soap bubble as shown in figure. Just after opening the valve,

A. Air from end 1 flows towards end 2. There is no change in the volume of the soap bubble.
B. Air from end 1 flows towards end 2. Volume of the soap bubble at end 1 decreases.
C. No change occurs.
D. Air from end 2 flows towards end 1. Volume of the soap bubble at end 1 increases.

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/_p_(1)=(4T)/(r_(1)) and /_p_(2)=(4T)/(r_(2))
r_(1)ltr_(2):./_p_(1)gt/_p_(2)
Therefore air will flow from 1 to 2 and volume of bubble at end 1 will increase.