MEDIUM

Earn 100

A Plank of wood is 3 cm thick,16 cm wide, and 75 cm long.

Another block of wood has a mass of 384 g and is a cube of a side length of 8 cm. Is this a block of wood more or less dense than the first plank of wood (Density = $500 kg / m^{3}$ )?

Important Questions on Gravitation

EASY

Science>Physics>Gravitation>Archimedes' Principle

The weight of the wooden block is

W

. The apparent weight of the body on floating water is

EASY

Science>Physics>Gravitation>Archimedes' Principle

Two metal pieces when immersed in liquid experience equal upthrust on them, then :

EASY

Science>Physics>Gravitation>Archimedes' Principle

A block floats with its fraction

η_{E}

inside water when immersed in a beaker containing water and kept on the earth. The beaker along with the block is shifted to the surface of the moon. If

η_{M}

is the fraction of the block now immersed in water, which of the following relations is correct?

EASY

Science>Physics>Gravitation>Archimedes' Principle

A metal sphere is dipped in water. If at

0 ° C

4 ° C

the buoyancies in water are

β_{1}

and

β_{2}

respectively, then :

MEDIUM

Science>Physics>Gravitation>Archimedes' Principle

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 $d_{3}$ ?

Question Image

EASY

Science>Physics>Gravitation>Archimedes' Principle

The SI unit of relative density is

EASY

Science>Physics>Gravitation>Archimedes' Principle

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?

EASY

Science>Physics>Gravitation>Archimedes' Principle

A piece of steel has a volume of $12 {cm}^{3}$ and a mass of $96 g$ . What is its density in $g {cm}^{- 3}$ ?

EASY

Science>Physics>Gravitation>Archimedes' Principle

How can you define volume and density of a substance?

EASY

Science>Physics>Gravitation>Archimedes' Principle

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>Gravitation>Archimedes' Principle

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?

EASY

Science>Physics>Gravitation>Archimedes' Principle

A solid object of mass

200 g

and volume

250 {cm}^{3}

is put in water. Will it float or sink?

EASY

Science>Physics>Gravitation>Archimedes' Principle

While determining the density of copper piece using spring balance and a measuring cylinder, Nitin 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 produce is:

EASY

Science>Physics>Gravitation>Archimedes' Principle

The mass of an empty