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OR Form 1 Physics Measurement 1 Video Questions and Answers

Describe an experiment to find the density of copper turnings using a density bottle and kerosene.

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- Measure the mass m_0 of a clean dry empty density bottle.
- Fill the bottle partly with copper turnings and measure mass m_1.
- Fill up the bottle with kerosene up to the neck and measure its mass as  m_2.
- Empty the bottle and rinse it.
- Fill it with kerosene and replace it with the stopper, wipe outside dry and measure the mass m_3 of the bottle filled with kerosene.
Results
Mass of kerosene= (m_3-m_0) g
Volume of kerosene = ((m_3 -m_0))/0.8 cm^3
(Since density of kerosene 0.8gcm^(-3))
Mass of copper turnings = (m_1-m_0) g
Mass of kerosene present when the bottle is filled with copper turnings and kerosene = (m_2-m_1) g
Volume of kerosene = ((m_2-m_1))/0.8 cm^3
Volume of copper turnings = ({(m_3 -m_0) - (m_2-m_1)})/0.8 cm^3
Therefore density of copper turnings = (0.8(m_1-m_0) )/({(m_3 - m_0) - (m_2-m_1)})

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