Page 57 - Physics

Measurement

4. The object will displace some water Acti vity 2.6
which will be collected in the beaker,
shown in Figure 2.37. Aim: To measure volume of
an irregular object using

String a eureka can.
Spout Materials: eureka can, stone, water,
Displaced
Water water beaker, measuring
cylinder and string
Stone
Beaker
String
Spout
Displaced
Water water
Figure 2.37: Water displaced
Stone Beaker
5. Transfer the displaced water into a
measuring cylinder, shown in Figure
2.38.
6. Measure the volume of the displaced Figure 2.39
water. The volume of the displaced Procedure
water is equal to the volume of the 1. Set up the apparatus as in Figure
object under study, 2.39.
2. Tie the stone with a string and gently
lower it into the water contained in
the eureka can.
3. Collect the overfl owing water in the
beaker below the spout.
4. Measure and record the volume of the
Water level displaced water using a measuring
cylinder.

Questions
(a) Why must the stone be tied and
gently lowered into the water?
(b) Why is the water in the eureka
can displaced when the stone is
immersed?
Figure 2.38: Reading the volume of
the stone
The stone is tied before lowering so that
Note: The volume of solid objects with it can be gently lowered to prevent water
irregular shape can be determined by from splashing. If water splashes wrong
using immersion methods. results may be recorded as the remaining

51

Physics Form 1 Final.indd 51 16/10/2024 20:55