Efficiency is adimensional, meaning there is no associated unit, just a number - and the number should be the same in different measurement systems. Efficiency can be any number between 1 (equivalent to 100%) and 0 (equivalent to 0%).
Efficiency is normally written as a percentage, and does not have an SI unit."percent". It has no units.
In SI units, that would be the Newton.In SI units, that would be the Newton.In SI units, that would be the Newton.In SI units, that would be the Newton.
SI and metric are the same units.
International System of Units (SI)
The principal SI units used to derive all other SI units are the base SI units. These are the units for physical quantities such as length, time, mass, electric current, temperature, amount of substance, and luminous intensity.
most of the world does SI so more people can understand with it in SI units
most of the world does SI so more people can understand with it in SI units
there is no unit. its usually a percent. so it would be something like joules/joules, which would be nothing.
SI units are more accurate than English system units
When SI units combine, they create derived SI units that are used to express physical quantities. These derived units are formed by multiplying or dividing the base SI units. Examples include the Newton (kg*m/s^2) for force and the Pascal (N/m^2) for pressure.
Si and metric are the same thing. SI was a redefinition of metric in 1960.
"SI", from the French "Systeme Internationale".