B. Short/Long Answer Questions :
1. Define the term volume of an object.
2. State and define the S.I. unit of volume.
3. State two smaller units of volume. How are they
related to the S.I. unit?
4. How will you determine the volume of a
cuboid ? Write the formula you will use.
5. Name two devices which are used to measure the
volume of an object. Draw their neat diagrams,
6. How can you determine the volume of an
irregular solid (say a piece of brass) ? Describe
in steps with neat diagrams.
Answers
Answer:
1) Volume of an object is defined as the space occupied by an object.
2) S.I. unit of volume is litre (L).
1 litre is defined as the volume (space) occupied by 1 kg of water at 4° C.
3) Two smaller units of volume are :
a) milliliter (mL) : 1 litre = 1000 millilitres
b) cubic millimeter : 1 litre = 1000000 cubic millimeter
4) Volume of a cuboid is equal to the product of its length, height and breadth. So, V = l*b*h.
5) Vernier callipers and screw gauge can be used to measure the volume of an uniform object.
You can find their diagrams in any ideal physics book or you can just google them out.
6) Suppose, you have a piece of brass, and you have to measure it's volume then, just apply some logic. Volume is space occupied by an object. So, if you put an object in water, then the volume of water displaced by object will be equal to the volume of object. Hence, this problem is solved. Take a breaker, half filled with water and measure the water level. Then, place the object in water and mark the final level of water. So, volume of object will be equal to the volume of water displaced which is equal to the volume of water which rose up......
Hope it helps you.
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