Upthrust in Fluids, Archimedes’ Principle and Floatation Exe-5B Relative Density and it’s Measurement by Archimedes’ Principle Very Short Answer Type for Class-9 ICSE Concise Physics. There is the solutions of Very short Answer type Questions of your latest textbook which is applicable in 2025-26 academic session. Visit official Website CISCE for detail information about ICSE Board Class-9.
Upthrust in Fluids, Archimedes’ Principle and Floatation Exe-5B Very Short Answer
(ICSE Class – 9 Physics Concise Selina Publishers)
| Board | ICSE |
| Class | 9 |
| Subject | Physics |
| Writer / Publication | Concise selina Publishers |
| Chapter-5 | Upthrust in Fluids, Archimedes’ Principle and Floatation |
| Exe – 5B | Relative Density and it’s Measurement by Archimedes’ Principle |
| Topics | Solution of Exe-5(B) Very Short Answer Type |
| Academic Session | 2025-2026 |
Exe-5B Relative Density and it’s Measurement Very Short Answer Type
Ch-5 Upthrust in Fluids, Archimedes’ Principle and Floatation Physics Class-9 ICSE Concise
Page 129
Que-1: Define the term density.
Ans: The density of a substance is its mass per unit volume.
Que-2: What are the unit of density in (i) C.G.S (ii) S.I system
Ans: (i) The C.G.S. unit of density is gcm-3.
(ii) The S.I. unit of density is kgm-3.
Que-3: Express the relationship between the C.G.S. and S.I. units of density.
Ans: 1 gcm-3 = 1000 kgm-3
Que-4: The density of iron is 7800 kg m-3‘. What do you understand by this statement?
Ans: It means the mass of 1 m-3 of iron is 7800 kg.
Que-5: Write the density of water at 4°C in S.I. units.
Ans: Density of water at 4°C in S.I. units is 1000 kgm-3.
Que-6: How are the (i) Mass, (ii) Volume and (iii) Density of a metallic piece affected, if at all, with an increase in temperature?
Ans: (i) Mass of a metallic body remains unchanged with increase in temperature.
(ii) Volume of metallic body increases with an increase in temperature.
(iii) Density (= Mass/volume) of a metallic body decreases with an increase in temperature.
(Upthrust in Fluids Exe-5B Very Short ICSE)
Que-7: Complete the following sentences.
(i) Mass = ……………….. × density
(ii) S.I. unit of density is ………. .
(iii) Density of water is …. … kg m-3.
(iv) Density in kg m-3 = ………… × density in g cm-3
Ans: (i) Volume, (ii) kg m-3, (iii) 1000 and (iv) 1000
Que-8: What is the unit of relative density?
Ans: Relative density is the ratio of two similar quantities; thus, it has no unit.
Que-9: A body weighs W gf in air and W1 gf when it is completely immersed in water. Find: (i) Volume of the body, (ii) Upthrust on the body and (iii) Relative density of the material of the body.
Ans: (i) Volume of the body = (W – W1) cm3
(ii) Upthrust on the body = (W – W1)gf
(iii) R.D. of the material of body = W/W – W1
— : End of Upthrust in Fluids, Archimedes’ Principle and Floatation Exe-5B Very Short Answer Type Solutions :–
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