Page 52 - Physics

Physics for Secondary Schools

the volume of a cube whose sides are one Measurement of the volume of liquid
centimetre long, shown in Figure 2.25. Several graduated apparatus such as
a graduated cylinder, burette or pipette
are usually used to measure the volume
of a liquid in the laboratory. Calibrated
1 cm beakers and fl asks can also be used. In
rare cases, syringes are used for measuring
the volume of liquids. A burette, a pipette
or a volumetric flask gives accurate
measurement of liquid volumes.
1 cm
1 cm
Measurement of volume using a
measuring cylinder
Figure 2.25: A cube of 1 cm length
Measuring cylinders are used to measure
Litre is another metric unit used to measure the volume of a liquid, ranging from a few
the volume of liquids. millilitres to hundreds of millilitres. They
are of different sizes, made of glass or
1 litre = 1 000 cm = 1 000 ml. This implies plastic. Measuring cylinders are graduated
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that 1 cm = 1 ml. The volume of water in a from the bottom upwards. They measure
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1 the volume of liquids that are poured into
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1 litre= m as shown in Figure 2.26. them. An example of a measuring cylinder
1 000
is shown in Figure 2.27.

1000 mL
900
800
700
600
500
400
Figure 2.26: One litre-bottle of water
300
Techniques for measuring volume 200
100
The techniques for measuring volume do
vary depending on whether the sample is
liquid, solid, or gas. The volumes of liquids Figure 2.27: Measuring cylinder
are measured using special apparatus; that When reading a measuring cylinder, the
are graduated in cm or ml. cylinder must be placed on a level surface.
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46
Student’s Book Form One

Physics Form 1 Final.indd 46 16/10/2024 20:55