A block of iron has dimensions 2 m × 0 . 5 m × 0 . 25 m . The density of iron is 7 . 8 g cm - 3 . Find the mass of block.

Given, Length of the iron block l = 2 m Breadth of the iron block b = 0 . 5 m Height of the iron block h = 0 . 25 m Density of iron d = 7 . 8 g cm - 3 = 7 . 8 × 1000 = 7800 kg m - 3 The volume of the block V = l × b × h = 2 × 0 . 5 × 0 . 25 = 0 . 25 m 3 Therefore, the mass M of iron block is, M = V × d = 0 . 25 × 7800 M = 1950 kg

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

A jar is filled with two non-mixing liquids $1$ and $2$ having densities $d_{1}$ and $d_{2}$ , respectively. A solid ball, made of a material of density $d_{3}$ , is dropped in the jar. It comes to equilibrium in the position shown in the figure. Which of the following is true for $d_{1}$ , $d_{2}$ and $d_{3}$ ?

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

A cork has a volume of

25 {cm}^{3}

. The density of cork is

0.25 g {cm}^{- 3}

. Find the mass of cork.

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The volume of

50 g

of a substance is

20 {cm}^{3}

. If the density of water is

1 g {cm}^{- 3}

will the substance float or sink?

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

Define the term density of a substance.

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

While determining the density of the material of body a student recorded the following observations:

(i) Mass of the body $= 62.4 g$

(ii) Reading of water level in the measuring cylinder without body $16.4 mL$

(iii) Reading of water level in the measuring cylinder with body $= 24.4 mL$ . Based on these observations, the density of material of the body in $kg m^{- 3}$ is

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

A block of iron has dimensions

2 m \times 0.5 m \times 0.25 m

. The density of iron is

7.8 g {cm}^{- 3}

. Find the mass of block.

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The volume of a

500 g

sealed packet is

350 {cm}^{3}

. Will the packet float or sink in water if the density of water is

1 g {cm}^{- 3}

? What will be the mass of the water displaced by this packet?

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

For determining the density of a copper piece using a spring balance and a measuring cylinder, Seema carried out the following procedure:
i. Noted the water level in the measuring cylinder without the copper piece.
ii. Immersed the copper piece in the water.
iii. Noted the water level in the measuring cylinder with the copper piece inside it.
iv. Removed the copper piece from the water and immediately weighed it using a spring balance.
The wrong step in the procedure is

EASY

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The mass of an iron ball is

312 g

. The density of iron is

7.8 g {cm}^{- 3}

. Find the volume of the ball.

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The density of brass is

8.4 {gcm}^{- 3}

. What do you mean by the statement?

HARD

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

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

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

While performing the experiment 'to determine the density of a solid, four measuring cylinders with least counts

2.5 mL, 1.0 mL, 0.5 mL and 0.2 mL

are available. Which one will you prefer for finding the density of a solid accurately?

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The mass of a lead piece is

115 g

. When it is immersed into a measuring cylinder, the water level rises from

20 mL

mark to

30 mL

mark , Find the density of the lead in

kg m^{- 3}

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The mass of an empty

40 litre

petrol tank of a vehicle is

8 kg

. What will be its mass when filled completely with a fluid of density

700 kg m^{- 3}

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

A piece of brass of volume

30 {cm}^{3}

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g {cm}^{- 3}

, (ii)

kg m^{- 3}

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

How does the density of water changes when it is heated from

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4 ° C

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The density of copper is

8.9 g {cm}^{- 3}

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kg m^{- 3}

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The amount of matter contained in a unit volume is called:

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Science>Physics>Physical Quantities and Measurements>Density and Relative Density

A cubical tank of side

1 m

is filled with

800 kg

of a liquid. Find: (i) the volume of the tank, (ii) the density of the liquid in

kg m^{- 3}

MEDIUM

Science>Physics>Physical Quantities and Measurements>Density and Relative Density

The mass of

5 litres

of water is

5 kg

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g {cm}^{- 3}

What does density bottle means?

Important Questions on Physical Quantities and Measurements

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