Advertisement Remove all ads

Frank solutions for Class 9 Physics ICSE chapter 4 - Fluids [Latest edition]

Advertisement Remove all ads

Chapters

Class 9 Physics ICSE - Shaalaa.com

Chapter 4: Fluids

Exercise
Exercise [Pages 157 - 158]

Frank solutions for Class 9 Physics ICSE Chapter 4 Fluids Exercise [Pages 157 - 158]

Exercise | Q 1 | Page 157
What do you mean by pressure? Write its SI unit.
Exercise | Q 2 | Page 157
The atmospheric pressure is 75 cm of mercury. Express it in Nm-2.
Exercise | Q 3 | Page 157
Is pressure a scalar or vector physical quantity?
Exercise | Q 4 | Page 157
Define one Pascal.
Exercise | Q 5 | Page 157
What do you mean by thrust? Write its SI unit.
Exercise | Q 6 | Page 157
What length of the water column is equivalent to 0.76 m mercury column?
Exercise | Q 7 | Page 157
Why can't water be used in place of mercury in a barometer?
Exercise | Q 8 | Page 157
What physical quantity is measured in the bar?
Exercise | Q 9 | Page 157
State whether thrust is scalar or vector.
Exercise | Q 10 | Page 157

Differentiate between thrust and pressure.

Exercise | Q 11 | Page 157

(i) Calculate the height of a water column which will exert on its base the same
Pressure as the 70 cm column of mercury.
(ii) Will the height of the water column change if the cross-section of the water column is made wider?

Exercise | Q 12 | Page 157
Explain, why a gas bubble released at the bottom of a lake grows in size as it rises to the surface of the lake.
Exercise | Q 13 | Page 157

A dam has broader walls at the bottom than at the top. Explain.

Exercise | Q 14 | Page 157
The base of a cylindrical vessel measures 300 cm2. Water (density = 1000 kg m-3) is poured into it up to a depth of 6 cm. Calculate the pressure and thrust of water on the base. (g = 10 m s-2)
Exercise | Q 15 | Page 157

State three factors on which the pressure at a point in a liquid depends.

Exercise | Q 16 | Page 157
Deduce an expression for the pressure at a depth inside the liquid.
Exercise | Q 17.1 | Page 157

What is meant by a fluid?

Exercise | Q 17.2 | Page 157

What is a fluid pressure?

Exercise | Q 18 | Page 157

State the laws of liquid pressure.

Exercise | Q 19.1 | Page 157

How does the liquid pressure on a diver change according to the following condition:

When the driver moves horizontally

Exercise | Q 19.2 | Page 157

How does the liquid pressure on a diver change according to the following condition:

When the driver moves to the greater depth?

Exercise | Q 20 | Page 157
What do you mean by diver's suit?
Exercise | Q 21 | Page 157
Name some ambient pressure diving suits.
Exercise | Q 22 | Page 157

What fact about liquid pressure does the following diagram in the following figure illustrate?

Exercise | Q 23 | Page 157
What is a manometer? How does it show whether the pressure inside a vessel connected to one arm of it, is lower or above the atmospheric pressure?
Exercise | Q 24 | Page 157

The following figure shows a manometer containing a liquid of density p. The limb P of the manometer is connected to a vessel V and the limb Q is open to atmosphere. The difference in the levels of liquid in the two limbs of the manometer is h as shown in the diagram. The atmospheric pressure is P0.

(i) What is the pressure on the liquid surface in the limb Q?

(ii) What is the pressure on the liquid surface in the limb P?

Exercise | Q 25 | Page 157
State the principle on which a hydraulic press works. Write one use of the hydraulic press.
Exercise | Q 28.1 | Page 158

State Pascal's law of transmission of pressure.

Exercise | Q 28.2 | Page 158

Name three applications of Pascal's law.

Exercise | Q 29 | Page 158

What is the use of altimeter?

Exercise | Q 30 | Page 158
How does atmosphere pressure vary with height?
Exercise | Q 31 | Page 158
Why is an aneroid barometer called so?
Exercise | Q 32 | Page 158
What is a barometer to write two uses of a barometer?
Exercise | Q 33 | Page 158
Why is mercury used in a barometer?
Advertisement Remove all ads
Exercise [Pages 173 - 175]

Frank solutions for Class 9 Physics ICSE Chapter 4 Fluids Exercise [Pages 173 - 175]

Exercise | Q 1 | Page 173
What is meant by the term buoyancy?
Exercise | Q 2 | Page 173
Define up thrust and state its SI unit.
Exercise | Q 3 | Page 173
In what direction does the buoyant force act on a body due to a liquid?
Exercise | Q 4 | Page 173
What do you mean by the term upthrust of a liquid?
Exercise | Q 5 | Page 173
Why is a force needed to keep a block of cork inside water?
Exercise | Q 6 | Page 173
A piece of wood when left underwater again comes to the surface. Explain with reason.
Exercise | Q 7 | Page 173
Will a body weigh more in the air or in the water when weighed with a spring balance? Why?
Exercise | Q 8 | Page 173
A body dipped into a liquid experience an upthrust. State two factors on which upthrust on the body depend.
Exercise | Q 9 | Page 173

A small stone of mass m ( = 200 g ) is held underwater in a tall jar and allowed to fall as shown in the following figure. The free-body diagram of the stone is also shown.

(i) What does F2 represent?

(ii) What does m1 represent?

(iii) What is the net force acting on the stone?

(iv) What is the acceleration of the stone as it falls through water? Neglect the force due to viscosity. Assume that volume of stone = 80 cml, density of water = 1.0 g cm-3 and acceleration due to gravity g = 10 ms-2.

Exercise | Q 10 | Page 173

A body weighs 300 gf in air and 280 gf when completely immersed in water. Calculate:
(i) The loss in weight of the body,
(ii) The upthrust on the body.

Exercise | Q 11 | Page 173
A metal cube of 5 cm edge and density 9 g cm-3 is suspended by a thread so as to be completely immersed in a liquid of density 1.2 g cm-3. Find the tension in the thread. (Take g = 10 ms-2).
Exercise | Q 12 | Page 173

It is easier to lift a heavy stone under water than in air. Explain. 

Exercise | Q 13 | Page 173

State Archimedes principle.

Exercise | Q 14 | Page 173

Describe an experiment to verify the Archimedes' principle. 

Exercise | Q 15 | Page 173

Figure shows the same block of wood floating in three different liquids A, B and C of densities ρ1, ρ2  and ρ3 respectively. Which of the liquid has the highest density? Give a reason for your answer.

Exercise | Q 16 | Page 174
When a piece of wood is suspended from the hook of a spring balance, it reads 90 gf. The wood is now lowered into the water. What reading do you expect on the scale of the spring balance?
Exercise | Q 17 | Page 174
An iron ball of mass 600 g is dropped in mercury contained in a beaker. Will the ball float or sink? What will be its apparent weight?
Exercise | Q 18 | Page 174

Explain why an iron nail floats on mercury, but it sinks in water.

Hint : Density of iron is less than that of mercury, but more than that of water. 

Exercise | Q 19 | Page 174
Is the density of a body the same as its relative density?
Exercise | Q 20.1 | Page 174

Write the SI units of Buoyant force

Exercise | Q 20.2 | Page 174

Write the SI units of Density

Exercise | Q 20.3 | Page 174

Write the SI units of Weight of a body

Exercise | Q 20.4 | Page 174

Write the SI units of Relative density

Exercise | Q 21 | Page 174

An iron nail sinks in the water while an iron ship floats on water. Explain the reason.
What can you say about the average density of a ship floating on water?

Exercise | Q 22 | Page 174

A piece of ice floating in a glass of water melts, but the level of water in the glass does not change.

Give reasons.

Hint: Ice contracts on melting. 

Exercise | Q 23 | Page 174
A piece of wood of uniform cross-section and 15 cm height sinks 10 cm in water and 12 cm in spirit. Find the R.D. of wood and spirit.
Exercise | Q 24 | Page 174

A man first swims in sea water and then in river water. (i) Compare the weights of sea water and river water displaced by him.

(ii) Where does he find it easier to swim and why? 

Exercise | Q 25 | Page 174

If 2/3rds of a piece of wood submerges in water and 3/4ths of the same piece of wood submerges in oil. Find the density of the oil.

Exercise | Q 26 | Page 174
The R.D. of ice is 0.92 and that of sea water is 1.025. Find the total volume of an iceberg which floats with its volume 800 cm3 above water.
Exercise | Q 27 | Page 174

A piece of wax floats in brine. What fraction of its volume will be immersed?
R.D. of wax = 0.95, R.D. of brine = 1.1.

Exercise | Q 28 | Page 174

If the density of ice is 0.9 g cm-3, then what portion of an iceberg will remain below the surface of water in sea? (Density of sea water = 1.1 g cm-3) 

Exercise | Q 30 | Page 174
What is the common use of a lactometer?
Exercise | Q 31 | Page 174

Write the density of water at 4°C in S.I. unit .

Exercise | Q 32 | Page 174

A wooden cube of side 10 cm has a mass of 700 g. It will float in the water with:
(a) Half of its volume inside the water
(b) 3 cm height above the water surface
(c) 7 cm height above the water surface
(d) Just inside the water surface.

Exercise | Q 33 | Page 174

A block of wood of mass 24 kg floats on water. The volume of wood is 0.032 m3. Find : 

(a) the volume of block below the surface of water , 
(b) the density of wood.
(Density of water = 1000 kg m-3)

Exercise | Q 34 | Page 174
If the Relative density of platinum is 21.50, what does it signify?
Exercise | Q 35 | Page 175
The density of mercury is 13600 kg m-3. What is its relative density?
Exercise | Q 36 | Page 175

A body of volume 100 cm3 weighs 1 kgf in air. Find:
(i) Its weight in water and
(ii) Its relative density.

Exercise | Q 37 | Page 175
A body of mass 70 kg, when completely immersed in water, displaces 20,000 cm3 of water. Find the relative density of the material of the body.
Exercise | Q 38 | Page 175

The relative density of mercury is 13.6. State its density in
(i) C.G.S. unit and
(ii) S.I. unit.
 

Exercise | Q 39 | Page 175

The density of iron is 7.8 x 103 kg m-3. What is its relative density? 

Exercise | Q 40 | Page 175

How are the (i) Mass, (ii) Volume and (iii) Density of a metallic piece affected, if at all, with an increase in temperature?

Exercise | Q 41 | Page 175
How does the density of water change with temperature?
Exercise | Q 42.1 | Page 175

Complete the following result:

Mass = _______ × density

Exercise | Q 42.2 | Page 175

Complete the following result:

S.l. unit of density is _________

Exercise | Q 42.3 | Page 175

Complete the following result:

The density of water is ______ Kgm-3.

Exercise | Q 42.4 | Page 175

Complete the following result:

Density in kg m-3 = ______ x density in g cm-3

Advertisement Remove all ads
Exercise [Pages 177 - 178]

Frank solutions for Class 9 Physics ICSE Chapter 4 Fluids Exercise [Pages 177 - 178]

Exercise | Q 1 | Page 177

What do you mean by buoyancy?

Exercise | Q 2 | Page 177

What is meant by up thrust?

Exercise | Q 3 | Page 177

Is pressure a vector quantity?

Exercise | Q 4 | Page 177

Is thrust a scalar or vector quantity?

Exercise | Q 5 | Page 177

What is the SI unit of density?

Exercise | Q 6 | Page 177

What do you mean by relative density?

Exercise | Q 7 | Page 177

What are the factors on which the pressure of a liquid depends?

Exercise | Q 8 | Page 177

State Archimedes' principle. Does it apply to gases?

Exercise | Q 9 | Page 177

How is thrust different from pressure?

Exercise | Q 10 | Page 177

State Pascal's law.

Exercise | Q 11 | Page 177

Do all liquids exert pressure?

Exercise | Q 12 | Page 177

State two applications of Pascal's law.

Exercise | Q 13 | Page 177

What is the principle of a hydraulic machine?

Exercise | Q 14 | Page 177

State the principle on which Brahma press depends.

Exercise | Q 15 | Page 177

State two uses of a hydraulic press.

Exercise | Q 16 | Page 177

What is meant by atmospheric pressure?

Exercise | Q 17 | Page 177

What is the value of atmospheric pressure?

Exercise | Q 18 | Page 177

Name the instrument used to measure atmospheric pressure.

Exercise | Q 19 | Page 177

What is the use of altimeter?

Exercise | Q 20 | Page 177

What does a falling barometer indicate?

Exercise | Q 21 | Page 177

Define atmospheric pressure diving suits. Does a diving suit create buoyancy?

Exercise | Q 23 | Page 178

What do you mean by the term fluid pressure?

Exercise | Q 24 | Page 178

A dam has broader walls at the bottom than at the top. Explain.

Exercise | Q 25 | Page 178

State and explain Pascal's law of transmission of pressure.

Exercise | Q 27 | Page 177

State two factors which affect the atmospheric pressure as we go up.

Exercise | Q 28 | Page 178

How does the atmospheric pressure change with altitude?

Exercise | Q 29 | Page 177

What is the purpose of a barometer? State two major defects of a simple barometer.

Exercise | Q 31 | Page 178

Why do not we feel uneasy even under enormous pressure of the atmosphere above as?

Exercise | Q 32.1 | Page 178

How is the reading of a barometer affected when it is taken to: A mine

Exercise | Q 32.2 | Page 178

How is the reading of a barometer affected when it is taken to: A hill

Exercise | Q 33.1 | Page 178

A solid weighs 2.10 N in air. It has a relative density of 8.4. How much will the body weigh if placed: In water

Exercise | Q 33.2 | Page 178

A solid weighs 2.10 N in air. It has a relative density of 8.4. How much will the body weigh if placed: In a liquid of relative density 1.2

Exercise | Q 34 | Page 178

The density of iron is 7800 kg m-3. What do you mean by this statement? What is density of water at 40C?

Exercise | Q 35 | Page 178

Calculate the mass of a body whose volume is 2m3 and relative density is 0.52.

Exercise | Q 36 | Page 178

A piece of metal weighs 44.5 gf in air, 39.5 gf in water. What is the R.D. of the metal?

Exercise | Q 37 | Page 178

A body of volume 100 cm3 weighs 1 kgf in air. Calculate its weight in water. What is its relative density?

Exercise | Q 38 | Page 178

State the principle of floatation. What can you say about the average density of a ship floating on water?

Exercise | Q 40 | Page 178

For what purpose is the acid battery hydrometer used?

Exercise | Q 41 | Page 178

Explain why an iron nail floats on mercury, but it sinks in water.

Hint : Density of iron is less than that of mercury, but more than that of water. 

Exercise | Q 43.1 | Page 178

State the principle of floatation. 

Exercise | Q 43.2 | Page 178

Name an instrument based on this principle. State two uses of the instrument that you describe.

Exercise | Q 44.1 | Page 178

Explain the following : 

A balloon filled with hydrogen rises to a certain height and then stops rising further.

Exercise | Q 44.2 | Page 178

Explain the following:

An egg sinks in fresh water but floats in a strong solution of salt.

Exercise | Q 44.3 | Page 178

Explain the following:

A hydrometer is made heavy near the bottom.

Exercise | Q 44.4 | Page 178

Explain the following:

Icebergs floating in the sea are very dangerous for ships.

Exercise | Q 45 | Page 178
Using Archimedes' principle, describe an experiment to find the relative density of a solid which floats on water.
Exercise | Q 46 | Page 178
Using Archimedes' principle, describe an experiment to find the relative density of a solid denser than water.
Exercise | Q 47 | Page 178
State Archimedes' principle, describe an experiment to verify Archimedes' principle.
Exercise | Q 48 | Page 178

What is a barometer? How is a simple barometer constructed?

Exercise | Q 49 | Page 178

What is an aneroid barometer?
Draw a neat and labeled diagram to explain its construction and working.

Exercise | Q 50 | Page 178

Draw a simple diagram of a Fortin's barometer and state how it is used to measure the atmospheric pressure.

Exercise | Q 51 | Page 178

Describe an experiment to demonstrate that air exerts pressure.

Advertisement Remove all ads

Chapter 4: Fluids

Exercise
Class 9 Physics ICSE - Shaalaa.com

Frank solutions for Class 9 Physics ICSE chapter 4 - Fluids

Frank solutions for Class 9 Physics ICSE chapter 4 (Fluids) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CISCE Class 9 Physics ICSE solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Frank textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 9 Physics ICSE chapter 4 Fluids are Change of Pressure with Depth, Transmission of Pressure in Liquids, Pascal's Law, Atmospheric Pressure, Buoyancy Force, Archimedes' Principle, Floatation - Principle of Floatation, Relation Between the Density of a Floating Body, Determination of Relative Density of a Solid, Introduction of Fluid.

Using Frank Class 9 solutions Fluids exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Frank Solutions are important questions that can be asked in the final exam. Maximum students of CISCE Class 9 prefer Frank Textbook Solutions to score more in exam.

Get the free view of chapter 4 Fluids Class 9 extra questions for Class 9 Physics ICSE and can use Shaalaa.com to keep it handy for your exam preparation

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×