Relative Density

Q. A cork has a volume $25c{m}^3$ . The density of cork is $0.25gc{m}^{-3}$ . Find the mass of cork.

Q. A block of wood of density $0.8gc{m}^{-3}$ has a volume of $60c{m}^3$ . The mass of block will be

1. $60.8g$
2. $75g$
3. $0.013g$
4. $48g$

Q. Fill in the blanks :
The S.I. unit of density is ______.

Q. How will you determine the density of a stone using a measuring jar? Explain in detail. [5 Marks]

Q. The density of aluminium is $2.7gc{m}^{-3}$ and of brass is $8.4gc{m}^{-3}$ . For the same mass, the volume of :

1. nothing can be said.
2. both will be same
3. aluminium will be less than that of brass
4. aluminium will be more than that of brass

Q. Select the correct pair of the device and the physical quantity that it is used to measure.

1. $\text{Thermometer}:\text{Length}$
2. $\text{Electronic balance}:\text{Mass}$
3. $\text{Metre ruler}:\text{Time}$
4. $\text{Stopwatch}:\text{Temperature}$

Q. Fill in the blanks :
$Mass=density\times$ ________.

Q.

Write true or false :

A measuring beaker of capacity 200ml can measure only the volume 200ml of a liquid.

Q.

All liquids have a relative density less than 1.

1. True
2. False

Q. A block of iron has dimensions $2m\times 0.5m\times 0.25m$. The density of iron is $7.8gc{m}^{-3}$ . Find the mass of block.

Q. The mass of 5 𝑙𝑖𝑡𝑟𝑒 of water is 5 𝑘𝑔. Find the density of water in $gc{m}^{-3}$ .

Q. A piece of wood having dimensions $1m\times 2m\times 3m$ has $2kg$ mass. What is the density of wood? Would the wood float in water?
(density of water= $1000kg{m}^{-3}$)

1. $0.33\times {10}^{-3}kg{m}^{-3}$, No
2. $3kg{m}^{-3}$, Yes
3. $0.33kg{m}^{-3}$, Yes

4. $3\times {10}^{-3}kg{m}^{-3}$, No

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> State SI and CGS units of density. How are they related?

Q. The density of brass is $8.4gc{m}^{-3}$. What do you mean by this statement?

Q. The density of a substance is $0.5gc{m}^{-3}$. The substance _______.

(A) sinks in water
(B) floats in water
(C) remains at original position
(D) oscillates [1 Mark]

Q.

Write true or false :
The S.I. unit of density is $gc{m}^{-3}$.

Q. Define relative density. Density of mercury is $13600\frac{kg}{m^3}$. calculate its relative density.

Q. Find the mass of a liquid for which the density is $200\text{kg/}{\text{m}}^3$. The volume of the liquid is $750\text{mL}$.​

1. $150\text{g}$
2. $250\text{g}$
3. $200\text{g}$
4. $10\text{g}$

Q. What is the least volume of liquid that can be measured using a definite volume beaker of capacity $100\text{mL}$?

1. $100\text{mL}$
2. $10\text{mL}$
3. $50\text{mL}$
4. $1000\text{mL}$

Q. What is the least volume of liquid that can be measured using a definite volume beaker of capacity $100\text{mL}$?

1. $100\text{mL}$
2. $10\text{mL}$
3. $50\text{mL}$
4. $1000\text{mL}$

Q. Mercury has a density of $13.6g/c{m}^3$. What volume of mercury must be taken to obtain $225g$ of the metal?

1. $14.54c{m}^3$
2. $13.86c{m}^3$
3. $16.54c{m}^3$
4. $11.86c{m}^3$