Scalar quantities are physical quantities which only possess a magnitude (size). A vector is a physical quantity with a magnitude and a direction.
SCALARS AND VECTORS
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1. Physical Quantities
MEASUREMENT TECHNIQUES
The Metre Rule This instrument is commonly used in the laboratory to measure the length of wires or the distance between two points. Greater accuracy is attained by measuring from the 1.0 cm mark and then to subtract 1.0 cm from the result, because the zero mark is...
MEASUREMENT OF TIME
Due to different tome intervals that we wish to measure, we need different types of clocks and watches. Watches and pendulum clocks can be used to measure long intervals of time, and stopwatches and ticker tapes measure short intervals of time. Clocks are based on a...