Waec Model Questions Vol1 2020 Physics Question 1

Practice essay / theory question 1 from the 2020 Waec Model Questions Vol1 Physics examination. This question covers Measurements and Units, Practical Skills .

Waec Model Questions Vol1 2020 Physics Essay / Theory
Topics: Measurements and Units Practical Skills
Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • PHYSICS • essay

A laboratory set‑up is provided for measuring the density of an unknown liquid. The set‑up consists of a digital balance, a clean dry graduated cylinder (capacity 500 mL), a beaker, a thermometer and a stand with a clamp. The graduated cylinder is placed on the balance and the mass is recorded. The cylinder is then filled with the liquid and the new mass is recorded. The volume of liquid is read from the scale on the cylinder. The temperature of the liquid is also noted. Using this set‑up, answer the following:

Question Parts

( a )
Outline the step‑by‑step procedure required to determine the density of the liquid, including how you would record the necessary data.
( b )
The mass of the empty graduated cylinder is 150.0 g. After filling it with the liquid, the balance reads 420.5 g. The volume reading on the cylinder is 250.0 mL. Calculate the density of the liquid in kg m⁻³. Show all steps.
( c )
Identify two systematic errors and two random errors that could affect the density determination.
( d )
For each type of error listed in part (c), suggest one practical way to reduce its effect.

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About This Question

This is Waec Model Questions Vol1 2020 Physics Question 1. It is one of the essay questions from the 2020 Waec Model Questions Vol1 Physics examination.

The question covers Measurements and Units, Practical Skills .

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