New Trends in ICSE Physics 8>Chapter 2 - Physical Quantities and Measurement>EXERCISES>Q 5

HARD

8th ICSE

IMPORTANT

Earn 100

The Density of mercury is $13.6 g {cm}^{- 3}$ ; find the mass of mercury in kilogram if it occupies a volume of $100 {cm}^{3}$ .

Important Questions on Physical Quantities and Measurement

HARD

8th ICSE

IMPORTANT

New Trends in ICSE Physics 8>Chapter 2 - Physical Quantities and Measurement>EXERCISES>Q 6

The density of gold is

19.3 g {cm}^{- 3}

. What is the mass of a bar of gold in kilograms that measures

6 cm \times 4 cm \times 2 cm

?

HARD

8th ICSE

IMPORTANT

New Trends in ICSE Physics 8>Chapter 2 - Physical Quantities and Measurement>EXERCISES>Q 7

You want to carry a boulder home from the beach. It is

30 cm

On each side, and so has a volume of

27000 {cm}^{3}

. It is made of granite, which has a typical density of

2.8 g {cm}^{- 3}

. How much mass this boulder has?

MEDIUM

8th ICSE

IMPORTANT

New Trends in ICSE Physics 8>Chapter 2 - Physical Quantities and Measurement>EXERCISES>Q 8

Rocks are sometimes used along coasts to prevent erosion. If a rock needs to weigh

2000 kg

In order not to be shifted by waves, how big (what volume) does it need to be? You are using basalt, which has a typical density of

3200 kg m^{- 3}

.

HARD

8th ICSE

IMPORTANT

New Trends in ICSE Physics 8>Chapter 2 - Physical Quantities and Measurement>EXERCISES>Q 9

A golden-coloured cube is handed to you. The person wants you to buy it for '

1 lac

, saying that is a gold nugget. You pull out your Chemistry textbook and look up gold in the mineral table and read that its density is

19.3 g {cm}^{- 3}

. You measure the cube and find that it is

2 cm

on each side and weighs

40 g

. What is Its density? Is it gold? Should you buy it?