MEDIUM
12th Maharashtra Board
IMPORTANT
Earn 100

The speed of water is 2 m/s through a pipe of internal diameter 10 cm. What should be the internal diameter of nozzle of the pipe if the speed of water at nozzle is 4 m/s? 
 

Important Questions on Mechanical Properties of Fluids

MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 16
With what velocity does water flow out of an orifice in a tank with gauge pressure 4×105N/m2 before the flow starts? Density of water =1000 kg/m3
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 17
The pressure of  water inside a closed pipe is 3×105N/m2. This pressure reduces 2×105N/m2 on opening the valve of the pipe. Calculate the speed of water flowing through the pipe. Density of water =1000 kg/m3
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 18
Calculate the rise of water inside a clean glass capillary tube of radius 0.1mm , when immersed in water of surface tension 7x10-2 N/m. The angle of contact between water and glass is zero, density of water = 1000 kg/m3, g = 9.8 m/s2. 
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 19
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 x 10-2 N/m.
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 20
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. 
 
MEDIUM
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 21
A drop of mercury of radius 0.2 cm is broken into 8 identical droplets. Find the work done if the surface tension of mercury is 435.5 dyne/cm.
EASY
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 22
How much work is required to form a bubble of 2 cm radius from the soap solution having surface tension 0.07 N/m. 
 
EASY
12th Maharashtra Board
IMPORTANT
Physics Standard 12>Chapter 2 - Mechanical Properties of Fluids>Exercises>Q 23
A rectangular wire frame 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 soap film is 3x10-2 N/m.