28 A straw 6cm long floats on water The wate film on one

Last updated: 6/2/2023

28 A straw 6cm long floats on water The wate film on one side has surface tension of dyne cm on the other side camphor reduc the surface tension to 40 dyne cm T resultant force acting on the straw is 1 60 dyne 2 10 dyne 3 30 dyne 4 0 dyne