A soap bubble contains two surface layers. What is the excess pressure just inside the first layer when seen from outside the bubble?

A soap bubble contains two surface layers. What is the excess pressur

1.	A soap bubble contains two surface layers. What is the excess pressure just inside the first layer when seen from outside the bubble?
A.	2S/R
B.	4S/R
C.	-2S/R
D.	-4S/R
Answer» B. 4S/R

Discussion

No Comment Found

Related MCQs

If a glass tube is of insufficient length, water rises and overflows.
Consider a capillary tube in which water has risen. The contact angle is θ. The radius of the capillary tube is ‘r’. The surface tension is ‘S’. And the density of water is ‘ρ’. What is the expression for the height of water risen in the tube? Assume the radius of meniscus to be ‘R’. Let the height of water risen in the tube be ‘h’.
The contact angle determines whether liquid will rise or get depressed along a solid surface. Select the correct statement regarding the same.
A soap bubble contains two surface layers. What is the excess pressure just inside the first layer when seen from outside the bubble?
What is the value of pressure inside the bubble of radius 1cm, if the bubble is in water at a depth (H) of 1m? Assume atmospheric pressure to be 1atm, surface tension = 0.075N/m & density of water = 1000kg/m3.
Consider a spherical drop of liquid having radius ‘R’. Assume a diametric cross-section which divides the drop into two hemispheres. The hemispheres pull each other due to surface tension along the circumference of the diametrical cross-section. What is the value of this force?
What will be the change in surface energy when a drop of liquid (S = 0.08N/m) is divided into 10 equal droplets? Radius of initial single drop (R)= 5cm.
A U-shaped frame consists of a sliding rod connecting its two arms. It is dipped in a soap solution and then placed horizontally. The weight of the sliding rod is 100gm. Surface tension (S) = 0.05 & length of sliding wire = 20cm. If the sliding rod starts from rest at t=0, find its velocity at t=5s. Assume that there are no resistive forces.
The unit of surface tension is same as that of _________
Consider two lines on the surface of water kept in a beaker. The length of one line is twice the others. A force will be acting on the lines from either side. What is the ratio of magnitude of F1 & F2?

A soap bubble contains two surface layers. What is the excess pressure just inside the first layer when seen from outside the bubble?

Discussion

No Comment Found

Related MCQs

Reply to Comment