Fluid Mechanics
Physics ⇒ Mechanics
Fluid Mechanics starts at 8 and continues till grade 12.
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See sample questions for grade 9
A balloon filled with helium rises in air. Explain why.
A block of wood floats on water but sinks in oil. Is the density of oil greater or less than that of water?
Define density.
Describe the difference between absolute pressure and gauge pressure.
A balloon filled with helium rises in air. Explain why.
A block of wood floats on water but sinks in oil. Is the density of oil greater or less than that of water?
A cube of side 0.1 m is completely submerged in water. What is the volume of water displaced?
A stone weighs 10 N in air and 6 N when fully immersed in water. What is the buoyant force acting on the stone?
The pressure exerted by a liquid at a given depth depends on which of the following?
(1) Density of the liquid
(2) Depth of the liquid
(3) Acceleration due to gravity
(4) All of the above
Which of the following best describes viscosity?
(1) The ability of a fluid to flow
(2) The resistance of a fluid to flow
(3) The density of a fluid
(4) The pressure exerted by a fluid
Which of the following instruments is used to measure atmospheric pressure?
(1) Thermometer
(2) Barometer
(3) Hydrometer
(4) Manometer
Which of the following is an example of application of Pascal's Law?
(1) Siphon
(2) Hydraulic press
(3) Barometer
(4) Thermometer
A liquid exerts pressure on the walls of its container because its molecules are in ________ motion.
A ship floats on water because its average density is ________ than that of water.
If the area of contact is decreased, the pressure exerted by a force will ________.
The device used to measure the pressure of a gas in a container is called a ________.
True or False: Gases are compressible, while liquids are almost incompressible.
True or False: Liquids are considered incompressible fluids.
True or False: The buoyant force on a floating object is equal to the weight of the object.
True or False: The pressure at a point in a fluid at rest is the same in all directions.
