Question

Choose the correct SI unit.
Length: metre, centimetre or foot;
Mass: kilogram or gram
Time: hour or second

Answer 1

SI units are the fundamental units for various physical quantities accepted all over the world. The Si unit given for length is 'meter', for mass it is 'kilogram' and for the time it is 'second'. Though length, mass and time can be expressed in terms of other units as well but these are the standard units used uniformly all over the world.