Define the term density of a substance.

Important Questions on Physical Quantities and Measurement

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 10

State the SI and CGS units of density. How are they interrelated?

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 11

The density of brass is $8.4 {\mathrm{gcm}}^{-3}$. What do you mean by the statement?

HARD

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 12

Arrange the following substances in order of their increasing density: (a) iron, (b) cork, (c) brass, (d) water and (e) mercury.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 13

How does the density of water changes when it is heated from $0° \mathrm{C}$ to $4° \mathrm{C}$?

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 13

How does the density of water changes when it is heated from $4°\mathrm{C}$ to $10°\mathrm{C}$?

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 14

Write the density of water at $4°\mathrm{C}$.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 15

Explain the meaning of the term speed.

MEDIUM

7th ICSE

IMPORTANT

Concise PHYSICS Middle School 7>Chapter 1 - Physical Quantities and Measurement>TEST YOURSELF>Q 16

Write the S.I. unit of speed.