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,
7. You are required to take out 200 mL of milk from
a bucket full of milk. How will you do it?
Answers
1. The space occupied by an object is called volume
2.The SI unit of volume is the cubic meter (m 3 ), which is the volume occupied by a cube that measures 1 m on each side. This very large volume is not very convenient for typical use in a chemistry laboratory. A liter (L) is the volume of a cube that measures 10 cm (1 dm) on each side.
3. A smaller unit of volume is cubic centimetre (symbol cm3) and cubic decimetre (symbol 1 dm3). One cubic centimetre is the volume of a cube of each side 1 centimetre, i.e., 1 cm3 = 1 cm × 1 cm × 1 cm.
4.Volume of cuboid = length × breadth × height. Here, length = 14 cm, breadth = 12 cm and height = 8 cm. Volume of cuboid = 14 × 12 × 8 cubic cm. = 1344 cubic cm.
5.Measuring jar, scale, vernier calipers are used to measure the volume of an object.
If the object is irregular, measuring jar is used and volume is measured by displacement method.
If the object is regular its dimensions are measured using either scale or vernier calipers and volume is calculated.
6.Take a piece of brass, a measuring cylinder, fine thread of sufficient length and some water. Place a measuring cylinder on a flat horizontal surface and fill it partially with water. Note the reading of the water level very carefully. Now tie the piece of brass with a thread and dip it completely into water.
7.To take out 200ml of milk from a bucket full of milk, take the measuring beaker of capacity 200ml and immerse the measuring beaker well inside the milk contained in the bucket so that the beaker gets completely filled with the milk.
Answer:
1) In math, volume can be defined as the 3- dimensional space enclosed by a boundary or occupied by an object. ... The volume of an object is measured in cubic centimetres, cubic inch, cubic foot, cubic meter, etc.
2) The Sl unit of volume is the cubic meter (m3), which is the volume occupied by a cube that measures 1 m on each side. This very large volume is not very convenient for typical use in a chemistry laboratory. A liter (L) is a volume of a cube that measures 10 cm (1 dm) on each side.