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Object Measurements. A three-dimensional desk for example, may be expressed as 25" X 82" X 39" which means the desk is 25 inches wide by 82 inches long and 39 inches tall. A window dimension on blueprints is treated as two-dimensional space. For example, a window that is 24 inches wide by 30 inches tall would be written as 24" X 30".
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One final consideration is that we cannot add or subtract dimensionless quantities (normal numbers such as 5, 12.8 and \(\frac{3}{4}\)) to a quantity with dimensions.
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Aug 28, 2019 · The Corbettmaths Practice Questions on Dimensional Analysis. Previous: Ordering Decimals Practice Questions
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L1 = L1M0T0I0Θ0N0J0. (1.5.2) Any quantity with a dimension that can be written so that all seven powers are zero (that is, its dimension is L0M0T0I0Θ0N0J0) is called dimensionless (or sometimes “of dimension 1,” because anything raised to the zero power is one). Physicists often call dimensionless quantities pure numbers.
