Density

Q.

The density of copper is 8.83 g $c{m}^{-3}$. Express it in kg $m^{-3}$.

Q. Why does an iron nail sink in water, whereas a ship made of iron float?

Q. If 10 g of ice at 0 C is mixed with 10 g of water at 40 C, the final mass of water in the mixture is 1) 10 g 2) 15 g 3) 18 g 4) 20 g

Q.

'The density of iron is 7800 kg $m^{-3}$'. What do you understand by this statement ?

Q.

Write the density of water at $4^{\circ }C$ in S.I. unit.

Q.

Define density and give its SI unit.

Q.

The relative density of gold is 19.3. The density of water is 1000 kg/m³. What is the density of gold in SI units?

Q.

A wooden block floats in water with two-third of its volume submerged.

(a) Calculate the density of wood.
(b) When the same block is placed on oil, three-quarter of its volume is immersed in oil. Calculate the density of oil.

Q.

Density of water is_________g/cm³ .

Q.

The scales - vernier callipers, metre scale and screw gauge has the least counts:

1. 0.1 mm, 1 mm, 0.01 mm respectively

2. 0.001 mm, 1 mm, 0.01 mm respectively

3. 0.1 mm, 0.1 mm, 0.01 mm respectively

4. 0.01 mm, 1 mm, 0.001 mm respectively

Q.

The symbol used for density is ρ (rho).

1. True
2. False

Q.

Define density. What is its SI unit?

Q.

Express the relationship between the C.G.S. and S.I. units of density.

Q. Cork floats in water because the density of cork is the density of water.

1. equal to
2. greater than
3. less than

Q.

Define the term density.

Q.

Density is a___ quantity. (scalar/vector)

Q.

It is easier to swim in the seawater than in the river water, because:

1. Seawater has waves.

2. Seawater is denser than river water.

3. Seawater is less dense than river water.

4. Sea water exerts less upthrust.

Q.

If the radius of the earth were to be increased by a factor of 3, by what factor would its density have to be changed to keep the 'g' same.

Q.

The SI unit of density is ______ (kg/m³ /g/cm³.

Q.

The density of water 1.0 g $c{m}^{-}3$. The density of iron is 7.8 g $c{m}^{-}3$. The density of mercury is of 13.6 g $c{m}^{-}3$. Answer the following :

(a) Will a piece of an iron float or sink in water?

(b) Will a piece of an iron float or sink in mercury?

Q. What will happen to the density of a body if its mass is doubled?

Q.

How do you calculate mass using density and volume?

Q.

The diagrams represent four measuring cylinders containing liquids. The mass and volume of the liquid in each cylinder are stated. Which two measuring cylinders could contain an identical liquid?
(a) W and X
(b) W and Y
(c) X and Y
(d) X and Z

Q.

Which of the following is a unit of time?

1. Light year

2. Millennium

3. Angstrom

4. Parsec

Q.

Mercury metal is poured into a graduated cylinder that holds exactly $22.5ml$. The mercury used to fill the cylinder weighs $306.0g$. From this information, calculate the density of mercury.

Q. If two quantities have the same unit, then they are ______.

1. same
2. different
3. related
4. None of the above

Q. Density or relative density of a substance can be negative.

1. True
2. False

Q.

A block of aluminium sinks in turpentine but floats in mercury.

Q.

Density is equal to ______________.

1. mass per unit volume

2. volume per unit mass

3. mass of a body

4. volume of a body

Q.

What is mass per unit volume called as ?