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Chapters
▶ 2: Mechanical Properties of Fluids
3: Kinetic Theory of Gases and Radiation
4: Thermodynamics
5: Oscillations
6: Superposition of Waves
7: Wave Optics
8: Electrostatics
9: Current Electricity
10: Magnetic Fields due to Electric Current
11: Magnetic Materials
12: Electromagnetic induction
13: AC Circuits
14: Dual Nature of Radiation and Matter
15: Structure of Atoms and Nuclei
16: Semiconductor Devices
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Solutions for Chapter 2: Mechanical Properties of Fluids
Below listed, you can find solutions for Chapter 2 of Maharashtra State Board Balbharati for Physics [English] 12 Standard HSC Maharashtra State Board.
Balbharati solutions for Physics [English] 12 Standard HSC Maharashtra State Board 2 Mechanical Properties of Fluids Exercises [Pages 54 - 55]
Multiple Choice Question.
A hydraulic lift is designed to lift heavy objects of maximum mass 2000 kg. The area of cross-section of piston carrying the load is 2.25 × 10-2 m2. What is the maximum pressure the smaller piston would have to bear?
0.8711 × 106 N/m2
0.5862 × 107 N/m2
0.4869 × 105 N/m2
0.3271 × 104 N/m2
Multiple Choice Question.
Two capillary tubes of radii 0.3 cm and 0.6 cm are dipped in the same liquid. The ratio of heights through which the liquid will rise in the tubes is
1: 2
2: 1
1: 4
4: 1
The energy stored in a soap bubble of diameter 6 cm and T = 0.04 N/m is nearly ______.
0.9 × 10–3J
0.4 × 10–3J
0.7 × 10–3J
0.5 × 10–3J
Multiple Choice Question.
Two hailstones with radii in the ratio of 1:4 fall from a great height through the atmosphere. Then the ratio of their terminal velocities is
1:2
1:12
1:16
1:8
Bernoulli's theorem is based on the conservation of
Linear momentum
Mass
Energy
Angular momentum
Why is the surface tension of paints and lubricating oils kept low?
How much amount of work is done in forming a soap bubble of radius r?
What is the basis of Bernoulli’s principle?
Why is a low-density liquid used as a manometric liquid in a physics laboratory?
What is an incompressible fluid?
Why two or more mercury drops form a single drop when brought in contact with each other?
Why does velocity increase when water flowing in broader pipe enters a narrow pipe?
Why does the speed of a liquid increase and its pressure decrease when a liquid passes through a constriction in a horizontal pipe?
Derive an expression for excess pressure inside a drop of liquid.
Obtain an expression for conservation of mass starting from the equation of continuity.
Explain the capillary action.
Derive an expression for capillary rise for a liquid having a concave meniscus.
Find the pressure 200m below the surface of the ocean if pressure on the free surface of liquid is one atmosphere. (Density of seawater = 1060 kg/m3)
In a hydraulic lift, the input piston had surface area 30 cm2 and the output piston has surface area of 1500 cm2. If a force of 25 N is applied to the input piston, calculate weight/force on output piston.
Calculate the viscous force acting on a raindrop of diameter 1 mm, falling with a uniform velocity of 2 m/s through air. The coefficient of viscosity of air is 1.8 × 10-5 Ns/m2.
A horizontal force of 1 N is required to move a metal plate of area 10-2 m2 with a velocity of 2 × 10-2 m/s, when it rests on a layer of oil 1.5 × 10-3 m thick. Find the coefficient of viscosity of oil.
With what terminal velocity will an air bubble 0.4 mm in diameter rise in a liquid of viscosity 0.1 Ns/m2 and specific gravity 0.9? Density of air is 1.29 kg/m3.
The speed of water is 2m/s through a pipe of internal diameter 10 cm. What should be the internal diameter of the nozzle of the pipe if the speed of the water at nozzle is 4 m/s?
With what velocity does water flow out of an orifice in a tank with gauge pressure 4 × 105 N/m2 before the flow starts? Density of water = 1000 kg/m3.
The pressure of water inside a closed pipe is 3 × 105 N/m2. This pressure reduces to 2 × 105 N/m2 on opening the valve of the pipe. Calculate the speed of water flowing through the pipe. [Density of water = 1000 kg/m3].
Calculate the rise of water inside a clean glass capillary tube of radius 0.1 mm, when immersed in water of surface tension 7 × 10-2 N/m. The angle of contact between water and glass is zero, the density of water = 1000 kg/m3, g = 9.8 m/s2.
An air bubble of radius 0.2 mm is situated just below the water surface. Calculate the gauge pressure. Surface tension of water = 7.2 × 10−2 N/m.
Twenty-seven droplets of water, each of radius 0.1 mm coalesce into a single drop. Find the change in surface energy. Surface tension of water is 0.072 N/m.
A drop of mercury of radius 0.2 cm is broken into 8 droplets of the same size. Find the work done if the surface tension of mercury is 435.5 dyn/cm.
How much work is required to form a bubble of 2 cm radius from the soap solution having surface tension 0.07 N/m?
A rectangular wireframe of size 2 cm x 2 cm, is dipped in a soap solution and taken out. A soap film is formed, if the size of the film is changed to 3 cm x 3 cm, Calculate the work done in the process. The surface tension of the soap film is 3 x 10-2 N/m.
Solutions for 2: Mechanical Properties of Fluids
Balbharati solutions for Physics [English] 12 Standard HSC Maharashtra State Board chapter 2 - Mechanical Properties of Fluids
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Concepts covered in Physics [English] 12 Standard HSC Maharashtra State Board chapter 2 Mechanical Properties of Fluids are Fluid and Its Properties, Thrust and Pressure, Pressure of liquid, Pressure Exerted by a Liquid Column, Atmospheric Pressure, Gauge Pressure and Absolute Pressure, Hydrostatic Paradox, Pascal’s Law, Application of Pascal’s Law, Measurement of Atmospheric Pressure, Mercury Barometer (Simple Barometer), Open Tube Manometer, Surface Tension, Molecular Theory of Surface Tension, Surface Tension and Surface Energy, Angle of Contact, Effect of Impurity and Temperature on Surface Tension, Excess Pressure Across the Free Surface of a Liquid, Explanation of Formation of Drops and Bubbles, Capillarity and Capillary Action, Fluids in Motion, Critical Velocity and Reynolds Number, Viscous Force or Viscosity, Stokes’ Law, Terminal Velocity, Equation of Continuity, Bernoulli's Equation, Applications of Bernoulli’s Equation.
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