Units and Measurement
Quantity Name Symbol Definition Length Metre m The metre is the length of the path travelled by light in a vacuum during a time interval of 1/299,792,458 of a second. (1983) Mass Kilogram kg The kilogram is defined by the fixed numerical value of the Planck constant, which is 6.62607015 × 10−34 kg⋅m2⋅s−1. Time Second…