The kilometre (American spelling: kilometer; SI symbol: km), the unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for 1000)
The millimetre (American spelling: millimeter; SI unit symbol mm; informal abbreviation: mil), the unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length
Is the height 10 kilometres a scalar quantity of greater magnitude than the height 1,000 millimetres?
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