A soap bubble , having radius of 1 mm is blown from, a detergent solution having a surface tension , of . The pressure inside the bubble equals at a point below the free surface of water in a container of water = , the value of is
100 cm
10 cm
1 cm
0.5 cm
GIVEN : surface tension = force /length = 0.025 N/m
radius = 1mm = 0.001m
p(final) - p(initial) = 4t/r
where z is a pressure inside the bubble
p(z=final) - p(initial) =pgh =pgz = 4t/r
pgz = 4t/r
z = 4t/pgr
z = 4(0.025)/(0.001)(1000)(10)
z =0.100/10
z = 0.100(0.1)
z = 0.01
z= 1(0.01)
z=1cm
option 3) 1cm