Units and Measurement

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The expression which shows how and which of the base quantities represent the dimensions of a physical quantity is called the dimensional formula of the given physical quantity. For example, the dimensional formula of the volume is [M °L³T°], and that of speed or velocity is [M° L T-1]. Similarly, [M° L T^-2 ] is the dimensional formula of acceleration and [M L^-3 T°] that of mass density.