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Chapters
2: Motion
▶ 3: Fluids
4: Electric charge and Electric current
5: Magnetism and Electromagnetism
6: Light
7: Heat
8: Sound
9: Universe
10: Matter Around Us
11: Atomic Structure
12: Periodic Classification of Elements
13: Chemical Bonding
14: Acids, Bases and Salts
15: Carbon and its Compounds
16: Applied Chemistry
17: Animal Kingdom
18: Organisation of Tissues
19: Plant Physiology
20: Organ Systems in Animals
21: Nutrition and Health
22: World of Microbes
23: Economic Biology
24: Environmental Science
25: Computer – LibreOffice Impress
![Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 3 - Fluids - Shaalaa.com](/images/science-english-class-9-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 3 - Fluids")
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Solutions for Chapter 3: Fluids
Below listed, you can find solutions for Chapter 3 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Science [English] Class 9 TN Board.
Samacheer Kalvi solutions for Science [English] Class 9 TN Board 3 Fluids Exercise [Pages 36 - 37]
Choose the correct answer.
The size of an air bubble rising up in water
decreases
increases
remains same
may increase or decrease
Clouds float in atmosphere because of their low ______.
density
pressure
velocity
mass
In a pressure cooker, the food is cooked faster because ______.
increased pressure lowers the boiling point
increased pressure raises the boiling point.
decreased pressure raises the boiling point
increased pressure lowers the melting point.
An empty plastic bottle closed with an airtight stopper is pushed down into a bucket filled with water. As the bottle is pushed down, there is an increasing force on the bottom. This is because
more volume of liquid is dispaced.
more weight of liquid is displaced.
pressure increases with depth.
all the above
The weight of the body immersed in a liquid appears to be______ than its actual weight.
The instrument used to measure atmospheric pressure is ______.
The magnitude of buoyant force acting on an object immersed in a liquid depends on ______ of the liquid.
A drinking straw works on the existence of ______.
State whether true or false. If false, correct the statement.
The weight of fluid displaced determines the buoyant force on an object.
True
False
State whether true or false. If false, correct the statement.
The shape of an object helps to determine whether the object will float or not
True
False
State whether true or false. If false, correct the statement.
The foundations of high-rise buildings are kept wide so that they may exert more pressure on the ground.
True
False
State whether true or false. If false, correct the statement.
Archimedes’ principle can also be applied to gases.
True
False
State whether true or false. If false, correct the statement.
Hydraulic press is used in the extraction of oil from oil seeds.
True
False
Match the following.
| 1. | Density | hρg |
| 2. | 1 gwt | Milk |
| 3. | Pascal’s law | `"Mass"/" Volume"` |
| 4. | Pressure exerted by a fluid | Pressure |
| 5. | Lactometer | 980 dyne |
Answer in brief.
On what factors the pressure exerted by the liquid depends on?
Why does a helium balloon float in air?
Why is it easier to swim in seawater than in river water?
What is meant by atmospheric pressure?
State Pascal’s law.
With an appropriate illustration prove that the force acting on a smaller area exerts a greater pressure.
Describe the construction and working of mercury barometer.
How does an object’s density determine whether the object will sink or float in water?
Explain the construction and working of a hydrometer with diagram.
State the laws of flotation.
Assertion: To float, body must displace liquid whose weight is equal to the actual weight.
Reason: The body will experience no net downward force in that case.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Assertion: Pascal’s law is the working principle of a hydraulic lift.
Reason: Pressure is thrust per unit area.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If assertion is false but reason is true.
Numerical Problem.
A block of wood of weight 200 g floats on the surface of water. If the volume of block is 300 cm3 , calculate the upthrust due to water.
Numerical Problem.
Density of mercury is 13600 kg m–3. Calculate the relative density.
Numerical Problem.
The density of water is 1 g cm–3. What is its density in S.I. units?
Numerical Problem.
Calculate the apparent weight of wood floating on water if it weighs 100g in air.
Higher Order Thinking Skill.
How high does the mercury barometer stand on a day when atmospheric pressure is 98.6 kPa?
Higher Order Thinking Skill.
How does a fish manage to rise up and move down in water?
If you put one ice cube in a glass of water and another in a glass of alcohol, what would you observe? Explain your observations.
Why does a boat with a hole in the bottom would eventually sink?
Solutions for 3: Fluids
Samacheer Kalvi solutions for Science [English] Class 9 TN Board chapter 3 - Fluids
Shaalaa.com has the Tamil Nadu Board of Secondary Education Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. Samacheer Kalvi solutions for Mathematics Science [English] Class 9 TN Board Tamil Nadu Board of Secondary Education 3 (Fluids) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
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Concepts covered in Science [English] Class 9 TN Board chapter 3 Fluids are Pressure of liquid, Factors Affecting Liquid Pressure, Pressure Exerted by a Liquid Column, Atmospheric Pressure, Measurement of Atmospheric Pressure, Mercury Barometer (Simple Barometer), Gauge Pressure and Absolute Pressure, Pascal’s Law, Hydraulic Machines: Hydraulic Press (Or Bramah Press), Density and It’s Unit, Relative Density and Its Unit, Principle of Floatation (Laws of Flotation), Application of Principle of Flotation, Buoyancy Force (Upthrust Force), Law of Floatation, Archimedes Principle, Thrust and Pressure.
Using Samacheer Kalvi Science [English] Class 9 TN Board solutions Fluids exercise by students is an easy way to prepare for the exams, as they involve solutions arranged chapter-wise and also page-wise. The questions involved in Samacheer Kalvi Solutions are essential questions that can be asked in the final exam. Maximum Tamil Nadu Board of Secondary Education Science [English] Class 9 TN Board students prefer Samacheer Kalvi Textbook Solutions to score more in exams.
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