A glass tub of 2.5 mm internal diameter is immersed in oil of mass den – McqOptions

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1.	A glass tub of 2.5 mm internal diameter is immersed in oil of mass density 940 kg/m3 to a depth of 9 mm. If a pressure of 148 N/m2 is needed to form a bubble which is just released, what is the surface tension of the oil?
A.	0.041 N/m
B.	0.043 N/m
C.	0.046 N/m
D.	0.050 N/m
Answer» B. 0.043 N/m

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