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Here's the text from the image, formatted in markdown: ## 1.3 How Do We Measure Physical Quantities? ### Simple Pendulum * The period of a simple pendulum is the time taken for one complete oscillation. * The period of oscillation depends on gravitational field strength and length of pendulum...

Here's the text from the image, formatted in markdown: ## 1.3 How Do We Measure Physical Quantities? ### Simple Pendulum * The period of a simple pendulum is the time taken for one complete oscillation. * The period of oscillation depends on gravitational field strength and length of pendulum. It is independent of the mass of the pendulum bob. ### Human Reaction Time * Most stopwatches can measure time to a precision of 0.01 s. * As human reaction time is about 0.3 s - 0.5 s, which is a random error, the readings are usually recorded to 1 dp to account for this error. (a) show understanding that all physical quantities consist of a numerical magnitude and a unit: mass (kg), length (m), time (s), current (A),