Materials: Density
Q4. Barry investigated the density of different fruits.
To determine the density of each fruit, he measured the volume of each fruit.
The diagram above shows the equipment he used.
(a) Describe a method Barry could have used to measure the volume of an orange, using this equipment.
[4 marks]
(b) He measured the volume of each fruit three times and then calculated a mean value.
(i) What are the advantages of taking three measurements and calculating a mean value?
Choose your answer fom the following reasons:
Allows anomalous results to be identified and ignored. |
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Improves the resolution of the volume measurement. |
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Increases the precision of the measured volumes. |
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Reduces the effect of random errors when using the equipment. |
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Stops all types of error when using the equipment. |
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[2 marks]
(ii) The three measurements for the volume of a grape were 2.1 cm3, 2.1 cm3 and 2.4 cm3.
Calculate the mean value he should use for the grape.
[3 marks]
(c) The mass of an apple was found to be 84.0 g. The volume of the apple was calculated as 120 cm3.
Calculate the density of the apple. Give the answer to the corect number of significant figures.
[5 marks]
[Total: 14 marks]
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