Home
Class 11
PHYSICS
A glass plate of length 0.1 m, breadth 1...

A glass plate of length `0.1 m`, breadth `15 xx 10^(3) m` and thickness `2 xx 10^(-3)m` weighs `8 xx 10^(-3) kg` in air, it is held vertically with its longer side horizontal and its lower half immersed in water. If the surfaces tension of water is `72 xx 10^(-3) N//m`, the apparent weight of the plate is `79.4 lambda xx 10^(-3) N`. Then find `lambda`

Text Solution

Verified by Experts

The correct Answer is:
`1`
`w_(app) = mg - f_(B) + 2T (l + T) = 8 xx 10^(-3) xx 10 - (0.1 xx 15 xx 10^(-3) xx 2 xx 10^(-3) )/(2) xx 10^(3) xx 10 + 2 xx 72 xx 10^(-3) (0.1 + 2 xx 10^(-3))= 79.4 xx 10^(-3) N`
Promotional Banner

Topper's Solved these Questions

  • SURFACE TENSION

    RESONANCE ENGLISH|Exercise Exercise- 2 PART - III|2 Videos

  • SURFACE TENSION

    RESONANCE ENGLISH|Exercise Exercise- 2 PART - IV|5 Videos

  • SURFACE TENSION

    RESONANCE ENGLISH|Exercise Exercise- 2 PART - I|5 Videos

  • STRING WAVES

    RESONANCE ENGLISH|Exercise Exercise|32 Videos

  • UNITS, DIMENSION & MEASUREMENT

    RESONANCE ENGLISH|Exercise Exercise|27 Videos

Similar Questions

Explore conceptually related problems

A glass plate of length 10 cm , breadth 1.54 cm and thickness 0.20 cm weigh 8.2 g in air. It is held vertically with the long side horizontal and the lower half under water. Find the apparent weight of the plate. Surface tension of water =7.3xx10^(-2)N//m and =9.8ms^(-12)

A square glass plate of length 10 cm and thickness 0.4 cm, weight 40 g in air. It is held vertically such that its lower edge rests on water surface. What is the apparent weight of glass plate now? (Given surface tension of water = 0.073 N m^(-1) )

What should be the radius of a water drop so that the excess pressure inside it is 0.2 atm? Surface tension of water is 72 xx 10^(-3) N//m ?

The minimum force required to separate a light glass plate of perimeter 5m from a water surface is (Given surface tension of water = 70 xx 10^(-3) N/m)

What is the radius of a steel sphere that wil float on water with exactly half the sphere submerged ? Density of steel is 7.9 xx 10^(3)kg//m^(3) and surface tension of water is 7 xx 10^(-2)N .

What should be the pressure inside a small air bubble of 0.1 mm radius situated just below the surface of water? Surface tension of water =72xx10^(-3)N//m and atmospheric pressure =1.013xx10^(5)N//m^(2)

Two long capillary tubes of diameter 5.0 mm and 4.0 mm are held vertically inside water one by one . How much high the water will rise in each tube ? ( g = 10 m//s^(2) , surface tension of water = 7.0 xx 10^(-2) N/m)

Calculate the force required to separate the glass plates of area 10^(-2)m^(2) with a film of water 0.05 mm thickness between them (surface tension of water =70xx10^(-3)N//m) )

A capillary tube of radius 0.25 mm is submerged vertically in water so that 25 mm of its length is outside water. The radius of curvature of the meniscus will be (surface tension of water =75xx10^(-3) N/m)

A particle of mass 2 xx 10^(-3) kg, charge 4 xx 10^(-3)C enters in an electric field of 5 V//m , then its kinetic energy after 10 s is