Home
Class 11
PHYSICS
A 5.0 cm long straight piece of thread i...

A 5.0 cm long straight piece of thread is kept on the surface of water. Find the force with which the surface on one side of the thread pulls it. Surface tension of water `=0.076Nm^-1`

Text Solution

Verified by Experts

The correct Answer is:
A, C
`L=5cm =5xx10^-2m`
`T=0.76N/m`
`F=T_1=0.76xx5xx10^-2`
`=3.8xx10^-3N`
Promotional Banner

Similar Questions

Explore conceptually related problems

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 )

The length of needle foating on the surface of water is 1.5 cm the force in addition to its weight required to lift the needle from water surface will be (surface tension of water =7.5N//cm )

A 10 cm long wire is placed horizontal on the surface of water and is gently pulled up with a force of 2xx10^(-2) N to keep the wire in equilibrium. The surface tension, in Nm^(-1) of water is

Diameters of the arms of a U tube are 10 mm and 1 mm . It is partially filled with water and it is held in a vertical plane . Find the difference in heights of water in both the arms . (Surface tension of water =70 dyne cm^(-1) angle of contact =0^(@).g=980cms^(-2))

A cube with mass m completely wettable by water floats on the surface of water each side of the cube is a what is the distance h between the lower face of cube and the surface of the water if surafce tension is S. Take densities of water as rho_(w) take angle of contact is zero.

The force required to lift a circular flat plate of radius 5 cm on the surface of water is: (Surface tension of water is 75 dyne/cm):-

Two vertical glass plates 1 mm apart are dipped into water. How high will the water rise between the plates. If the surface tension of water is 70 dyne cm^(-1)

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 .

The lower end of a capillary tube of diameter 2.00 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^(9-1) . 1 atmospheric pressure =1.01xx10^(5)Pa . Density of water =1000kg//m^(3),g=9.80ms^(-2) . Also calulate the excess pressure .