Neco 2019 Physics Question 43

Practice objective / multiple choice question 43 from the 2019 Neco Physics examination.

Neco 2019 Physics Objective / Multiple Choice Hard Difficulty
Question 43 NECO • 2019 • PHYSICS • objective

An irregular solid is weighed on a balance that has a systematic (zero) error of \(+0.02\,\text{g}\) and a random error of \(\pm0.01\,\text{g}\). Its mass reading is \(45.00\,\text{g}\). The volume is obtained by water‑displacement using a graduated cylinder that has a systematic error of \(+0.5\,\text{mL}\) and a random error of \(\pm0.2\,\text{mL}\); the recorded displaced volume is \(12.0\,\text{mL}\).\n\n(a) Determine the best estimate of the density of the solid, correcting for the systematic errors.\n\n(b) Calculate the combined (absolute) uncertainty in the density.\n\n(c) Identify which measurement (mass or volume) contributes the larger share to the overall uncertainty.

Answer Options

Correct Answer A. Density = 3.91 \pm 0.18\,g\,mL^{-1}; the volume measurement dominates the uncertainty.
B. Density = 3.75 \\pm 0.15\\,g\\,mL^{-1}; the mass measurement dominates the uncertainty.
C. Density = 3.91 \\pm 0.25\\,g\\,mL^{-1}; the mass measurement dominates the uncertainty.
D. Density = 4.12 \\pm 0.22\\,g\\,mL^{-1}; the mass measurement dominates the uncertainty.
Correct Answer
A
Correct Option:
Density = 3.91 \pm 0.18\,g\,mL^{-1}; the volume measurement dominates the uncertainty.

About This Question

This is Neco 2019 Physics Question 43. It is one of the objective questions from the 2019 Neco Physics examination.

Difficulty level: Hard .

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