Neco 2025 Physics Question 1

Practice practical question 1 from the 2025 Neco Physics examination. This question covers Measurements and Units, Density, Uncertainty analysis .

Neco 2025 Physics Practical
Topics: Measurements and Units Density Uncertainty analysis
Question 1 NECO • 2025 • PHYSICS • practical

An irregular solid is to be characterised by its density using the water‑displacement method. The solid is first dried and its mass is measured with a digital balance. Then the solid is gently immersed in a graduated cylinder containing water and the rise in water level is recorded. The following data are obtained: - Mass reading on the balance = 125.6 g (uncertainty ±0.1 g). - Initial water level = 45.0 mL (uncertainty ±0.2 mL). - Final water level after immersion = 58.3 mL (uncertainty ±0.2 mL). Using this information, answer the questions below.

Question Parts

( a )
State the mass of the solid and its absolute uncertainty.
( b )
Calculate the volume of the solid (in mL) and its absolute uncertainty.
( c )
Determine the density of the solid in g·mL⁻¹ and give its absolute uncertainty.
( d )
Express the final density result with the appropriate number of significant figures.
( e )
Identify two possible sources of systematic error in this experiment and suggest a method to reduce each error.

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About This Question

This is Neco 2025 Physics Question 1. It is one of the practical questions from the 2025 Neco Physics examination.

The question covers Measurements and Units, Density, Uncertainty analysis .

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