Method 2
In this method, a test-tube is floated in the water left in the measuring cylinder from Method 1
and the change in water level is measured.
(i) Read and record the mass m3 of the test-tube, as shown in Fig. 1.3.
m3 =
(ii) The test-tube is carefully lowered, by means of a piece of cotton, into the measuring
cylinder until it floats as shown in Fig. 1.4. Read and record the new water level V2 in the
measuring cylinder.
V2 =
(iii) Using your results from (a)(iii) and (b)(ii), calculate V3, the change in the water level,
where V3 = (V2 – V1).
V3 =
(iv) Calculate and record a value ρ2 for the density of water using the equation
ρ2 =