Physics (AS & A Level) · Oct / Nov 2022 · Paper 23 · Question 1

The rate of flow Q of a liquid along a narrow pipe of length L and radius r is given by Q = αr 4 L where α is a constant. An experiment is carried out to determine the value of α. The data from the experiment are shown in Table 1.1. Table 1.1 quantity value percentage uncertainty Q 2.72 × 10–8 m3 s–1 ± 3% r 7.1 × 10–5 m ± 2% L 2.5 × 10–2 m ± 4%

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