CBSE Class-6 Physics (Demo)

An iron needle sinks in water as its density is ________ $$1 \mathrm{~g} \mathrm{~cm}^{-3}$$.

Pick out the right statement from the following

The density of water at $$4^{\circ} \mathrm{C}$$ is

The body sinks in liquid when

The body will float on a liquid when

Iron needle sinks in water, but not an iron ship because

Which one can sink in a water ?

A rectangular glass slab (a regular body) of some object has mass $$\frac{1}{4} \mathrm{~kg}$$. Its length, breadth and height are $$3 \mathrm{~cm}, 2 \mathrm{~cm}$$ and 2 cm , respectively. That object is ____________.

Statement -I: The density of body $$A=0.2 \mathrm{~g} / \mathrm{cm}^{3}$$.

Statement – II : The density of body $$B=0.08 \mathrm{~kg} / \mathrm{m}^{3}$$.
Which is correct among these ?

A wood is of density $$680 \mathrm{~kg} / \mathrm{m}^{3}$$. It is submerged in three liquids. Those are alcohol, water and Glycerine. The density of alcohol is $$780 \mathrm{~kg} / \mathrm{m}^{3}$$, The density of water is $$1 \mathrm{~g} / \mathrm{cm}^{3}$$ and the density of Glycerine is $$1.250 \mathrm{~g} / \mathrm{cm}^{3}$$. In which liquid, the wood is less submerged ?

A density bottle weights 20.25 g when empty, 40.75 g when filled with a liquid X and 50.25 g when filled with water. Which is correct among these ?

A sphere of radius 1.4 m and weighs 500 kg . That sphere is $$\qquad$$ .

A boy constructed a paper boat. A small stone is kept inside the boat. The masses of paper and stones are $$15 \mathrm{~g}, 50 \mathrm{~g}$$ respectively and the volumes are $$40 \mathrm{~cm}^{3}, 75 \mathrm{~m}^{3}$$ respectively. The boat is kept into the kerosene oil. (The density of kerosene oil is equal to $$0.8 \mathrm{~g} / \mathrm{cm}^{3}$$ ). Then

The relative density of mercury = ___________

If relative density of gold is 19.3. Then the density of gold is ________ times in greater than the density of water.

___________ is used to determine the relative density of liquids.

The density of copper is $$8.9 \times 10^{3} \mathbf{~ k g} / \mathrm{m}^{3}$$. The relative density of copper is ________.

If the length of the wooden cube is 4 m and the mass is $$\frac{1}{8} \mathrm{~kg}$$, then the relative density of the wooden cube is _______.

A piece of iron has dimensions $$3 \mathrm{~cm} \times 1.5 \mathrm{~cm} \times 6 \mathrm{~cm}$$. If its mass is 205.2 g . Its relative density is _______.

An iron cylinder of radius 1.4 cm and length 8 cm is found to weigh 369.6 g . The relative density of iron cylinder is _________. (Take volume of cylinder $$=\pi r^{2} \mathbf{l}$$.)

Calculate the mass of a body whose volume is $$2 \mathrm{~m}^{3}$$ and relative density is 0.52 .

The volume of density bottle has 50 ml filled with water completely without bubbles and stopper transereted. After cleaning it, its mass is determined using a balance i.e., 200 g . Then it is completely filled with the given liquid after removing water and drying. Its mass is again determined ie. 160 g . The name of that liquid is __________.

A bottle weighs 30 g when empty, 53.5 g when filled with a liquid, and 48 g when filled with water. The relative density of that liquid is _______.

Find the mass of $$555 \mathrm{~cm}^{3}$$ of iron in kg when density of iron is $$7.6 \mathrm{~g} / \mathrm{cm}^{3}$$

Calculate the volume of wood of mass 6000 kg , when the density of wood is $$0.8 \mathrm{~g} / \mathrm{cm}^{3}$$