James wanted to determine the density of an irregular stone - GED Prep
Question
James wanted to determine the density of an irregular stone using the displacement method. He performed a simple experiment and placed the stone in a graduated cylinder containing water to a specific level. He ensured that the stone does not absorb or react with the water he used. He used the following setup to calculate the density of the stone.
What is the volume of the stone?
Answers
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Explanation
When using the displacement method, one has to take two readings from the graduated cylinder.
The first reading is the initial reading of the water before immersing the stone. This reading is taken below the water meniscus. The reading is 18 cm3
The second step is to take the reading after the stone is fully submerged in the water. This is achieved by taking the reading at the bottom of the meniscus. The volume of the water and the stone is = 26 cm3.
The volume of the stone is obtained by subtracting the volume of the initial water from that of the stone plus the water i.e.
26 cm3-19 cm3= 8 cm3.
Therefore, the volume of the stone is 8 cm3
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