waec model questions vol1 2017 physics
Essay • Question 1
Question 1
WAEC_MODEL_QUESTIONS_VOL1
•
2017
A laboratory experiment is conducted to determine the density of a liquid using a hydrometer. The hydrometer is calibrated to read a specific gravity of 1.0 when immersed in water at 4°C. In the experiment, the hydrometer reads 0.8 when placed in the liquid. The temperature of the liquid is 25°C.
(a) Explain how the concept of density is related to specific gravity.
(b) Calculate the density of the liquid in grams per cubic centimeter (g/cm³).
(c) Discuss two factors that could affect the accuracy of the hydrometer readings in this experiment.
Question Parts
(
a
)
Explain how the concept of density is related to specific gravity.
(
b
)
Calculate the density of the liquid in grams per cubic centimeter (g/cm³).
(
c
)
Discuss two factors that could affect the accuracy of the hydrometer readings in this experiment.
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