Home
Class 11
PHYSICS
A U-shaped wire is dipped in a soap solu...

A U-shaped wire is dipped in a soap solution, and removed. The thin soap film (which includes the small weight of the slider). The length of the slider is 30 cm. what is the surface tension of the film?

Text Solution

Verified by Experts

`2.5 times 10^-2 N m^-1`
Promotional Banner

Topper's Solved these Questions

  • MECHANICAL PROPERTIES OF FLUIDS

    NCERT GUJARATI|Exercise EXERCISE|31 Videos
  • LAW OF MOTION

    NCERT GUJARATI|Exercise EXERCISE (ADDITIONAL EXERCISE)|17 Videos
  • MECHANICAL PROPERTIES OF SOLIDS

    NCERT GUJARATI|Exercise Exercises|16 Videos

Similar Questions

Explore conceptually related problems

A U -shaped wire is dipped in a soap solution, and removed . The thin soap film formed between the wire and the light slider supports a weight of 1.5xx10^(-2)N (which includes the small weight of the slider ).The length of the slider is 30 cm . What is the surface tension of the film ?

A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5xx10^-2N (see figure). The length of the slider is 30cm and its weight negligible. The surface tension of the liquid film is

A wire of mass 1g is kept horizontally on the surface of water. The length of the wire that does not break the surface film is (surface tension of water is 70dynecm^-1 )

A circular planar wire loop is dipped in a soap solution and after taking it out, held with its plane vertical in air assuming thickness of film at the very small as sunlight falls on te soap film & observer receives reflected light.

The work done in increasing the size of soap film with dimensions 8cm xx3.75cm to 10cmxx6cm is 2xx10^(-4)J . The surface tension of the film in (N)/(m) is

There is a soap bubble of radius 2.4xx10^(-4)m in air cylinder which is originally at a pressure of 10^(5)(N)/(m^(2)) . The air in the cylinder is now compressed isothermally until the radius of the bubble is halved. (the surface tension of the soap film is 0.08Nm^(-1)) . The pressure of air in the cylinder is found to be 8.08xx10^(n)(N)/(m^(2)) . What is the value of n?

Thin films, including soap bubbles and oil slicks, show patterns of alternating dark and bright regions resulting from interference among the reflected light waves. If two waves are in phase their crest and troughs will coincide. The interference will be constructive and the aplitude of the resultant wave will be greater than the amplitude of either constituent wave. if the two waves are out of phase, the crests of one wave will coincide with the troughs of the other wave. The interference will be destructive and the amplitude of the resultant wave will be less than that of either constituent wave. at the interface between two transparent media some light is reflected and some light is refracted. * When incident light, reaches the surface at point a, some of the light is reflected as ray R_(a) and and some is refracted following the path ab to the back of the film. *At point b some of the light is refracted out of the film and part is reflected back refracted out of the fiml as ray R_(c) . R_(a) and R_(c) are parallel. However, R_(c) has travelled the extra distance within the film of abc. if the angle of incidence is small then abc is approximately twice the film's thickness. if R_(a) and R_(c) are in phase they will undergo constructive interference and the region ac will be bright if R_(a) and R_(c) are out of phase, they will undergo destructive interference. * Refraction at an interface never changes the phase of the wave. * For reflection at the interface between two media 1 and 2, if n_(1)ltn_(2) the reflected wave will change phase by pi . if n_(1)gtn_(2) the reflected wave will not undergo a phase change. for reference n_(air)=1.00 * if the waves are in phase after refection at all interfaces, then the effects of path length in the film are Constructive interference occur when (n= refractive index) 2t=mlamda//n" "m=0,1,2,3... .. Destructive interference occurs when 2t=(m+1//2)lamda//n" "m=0,1,2,3... Q. A 600 nm light is perpendicularly incident on a soap film suspended in air. The film is 1.00 mum thick with n=1.35. Which statement most accurately describes the interference of the light reflected by the two surfaces of the film?

PQRS is a rectangular frame of copper wire shown in figure the side RS of the frame is movable. If a soap film is formed on it then what is the diameter of the wire to maintain equilibirum (given surface tension of soap solution =0.045N//m and density of copper =8.96xx10^(3)kg//m^(3))

The figure shows a soap film in which a closed elastic thread is lying. The film inside the thread is pricked. Now the sliding wire is moved out so that the surface area increases. The radius circle of the circle formed by elastic thread will

The lower end of a capallary tube of diameter 2.50 mm is dipped 8.00 cm below the surface of water in a beaker .What is the pressure required in the tube in order to blow a hemispherical bubble at the end in water ? The surface tension of water at temperature of the experiments is 7.30xx10^(-2)Nm^(-1) . 1 atmospheric pressure 1.01xx10^(5)Pa . Density of water =1000kg//m^(3),g=9.80ms^(-2) .Also calculate the excess pressure .

NCERT GUJARATI-MECHANICAL PROPERTIES OF FLUIDS -EXERCISE
  1. Can Bernoulli's equations be used to describe the flow of water throug...

    Text Solution

    |

  2. Does it matter if one uses gauge instead of absolute pressures in appl...

    Text Solution

    |

  3. Glycerine flows steadly through a horizontal tube of length 1.5 m and ...

    Text Solution

    |

  4. In a test experiment on a model aeroplane in a wind tunnel, the flow s...

    Text Solution

    |

  5. Figures 10.23(a) and (b) refer to the steady flow of a (non-viscous) l...

    Text Solution

    |

  6. The cylindrical tube of a spray pump has a cross section of 8.0 cm^2 o...

    Text Solution

    |

  7. A U-shaped wire is dipped in a soap solution, and removed. The thin so...

    Text Solution

    |

  8. Figure 10.24(a) shows a thin liquid film supporting a small weight =4....

    Text Solution

    |

  9. What is the pressure inside the drop of mercury of radius 3.00mm at ro...

    Text Solution

    |

  10. What is the excess pressure inside a bubble of soap solution of radius...

    Text Solution

    |

  11. A tank with a square base of area 1.0 m^2 is divided by a vertical pos...

    Text Solution

    |

  12. A manometer reads the pressure of a gas in an enclosure as shown in fi...

    Text Solution

    |

  13. Two vessels have the same area but different shapes. The first shapes ...

    Text Solution

    |

  14. In deriving Bernoulli's equation, we equated the work done on the flui...

    Text Solution

    |

  15. What is the largest average velocity of blood flow in an artery of rad...

    Text Solution

    |

  16. A plane is in level flight at constant speed and each of its two wing...

    Text Solution

    |

  17. In Millikan's oil drop experiment. What is the terminal speed of an un...

    Text Solution

    |

  18. Mercury has an angle of contact equal to 140^@ with soda lime glass. A...

    Text Solution

    |

  19. Two narrow bores of diameters 3.00mm and 6.0mm are joined together to ...

    Text Solution

    |

  20. It is known that density rho of air decreases with height y as rho=r...

    Text Solution

    |