Surface Tension
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PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361280 If the surface tension of a soap solution is 3×102N/m then the work done in forming a soap film of 20cm×5cm will be

1 6×102J
2 6J
3 6×104J
4 6×103J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361281 A cylinder with a movable piston contains air under a pressure p1 and a soap bubble of radius ' r '. The pressure p2 to which the air should be compressed by slowly pushing the piston into the cylinder for the soap bubble to reduce its size by half will be : (The surface tension is σ and the temperature T is maintained constant)

1 [8p1+24σr]
2 [4p1+24σr]
3 [2p1+24σr]
4 [2p1+12σr]
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361282 A big water drop is formed by the combination of ' n ' small water drops of equal radii. The ratio of the surface energy of ' n ' drops to the surface energy of big drop is

1 n2:1
2 n:1
3 n:1
4 n3:1
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361283 Surface tension of a soap bubble is 2.0×102Nm1. Work done to increase the radius of soap bubble from 3.5cm to 7cm will be
Take [π=227]

1 0.72×104J
2 18.48×104J
3 9.24×104J
4 5.76×104J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361280 If the surface tension of a soap solution is 3×102N/m then the work done in forming a soap film of 20cm×5cm will be

1 6×102J
2 6J
3 6×104J
4 6×103J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361281 A cylinder with a movable piston contains air under a pressure p1 and a soap bubble of radius ' r '. The pressure p2 to which the air should be compressed by slowly pushing the piston into the cylinder for the soap bubble to reduce its size by half will be : (The surface tension is σ and the temperature T is maintained constant)

1 [8p1+24σr]
2 [4p1+24σr]
3 [2p1+24σr]
4 [2p1+12σr]
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361282 A big water drop is formed by the combination of ' n ' small water drops of equal radii. The ratio of the surface energy of ' n ' drops to the surface energy of big drop is

1 n2:1
2 n:1
3 n:1
4 n3:1
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361283 Surface tension of a soap bubble is 2.0×102Nm1. Work done to increase the radius of soap bubble from 3.5cm to 7cm will be
Take [π=227]

1 0.72×104J
2 18.48×104J
3 9.24×104J
4 5.76×104J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361280 If the surface tension of a soap solution is 3×102N/m then the work done in forming a soap film of 20cm×5cm will be

1 6×102J
2 6J
3 6×104J
4 6×103J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361281 A cylinder with a movable piston contains air under a pressure p1 and a soap bubble of radius ' r '. The pressure p2 to which the air should be compressed by slowly pushing the piston into the cylinder for the soap bubble to reduce its size by half will be : (The surface tension is σ and the temperature T is maintained constant)

1 [8p1+24σr]
2 [4p1+24σr]
3 [2p1+24σr]
4 [2p1+12σr]
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361282 A big water drop is formed by the combination of ' n ' small water drops of equal radii. The ratio of the surface energy of ' n ' drops to the surface energy of big drop is

1 n2:1
2 n:1
3 n:1
4 n3:1
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361283 Surface tension of a soap bubble is 2.0×102Nm1. Work done to increase the radius of soap bubble from 3.5cm to 7cm will be
Take [π=227]

1 0.72×104J
2 18.48×104J
3 9.24×104J
4 5.76×104J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361280 If the surface tension of a soap solution is 3×102N/m then the work done in forming a soap film of 20cm×5cm will be

1 6×102J
2 6J
3 6×104J
4 6×103J
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361281 A cylinder with a movable piston contains air under a pressure p1 and a soap bubble of radius ' r '. The pressure p2 to which the air should be compressed by slowly pushing the piston into the cylinder for the soap bubble to reduce its size by half will be : (The surface tension is σ and the temperature T is maintained constant)

1 [8p1+24σr]
2 [4p1+24σr]
3 [2p1+24σr]
4 [2p1+12σr]
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361282 A big water drop is formed by the combination of ' n ' small water drops of equal radii. The ratio of the surface energy of ' n ' drops to the surface energy of big drop is

1 n2:1
2 n:1
3 n:1
4 n3:1
PHXI10:MECHANICAL PROPERTIES OF FLUIDS

361283 Surface tension of a soap bubble is 2.0×102Nm1. Work done to increase the radius of soap bubble from 3.5cm to 7cm will be
Take [π=227]

1 0.72×104J
2 18.48×104J
3 9.24×104J
4 5.76×104J