to determine accurate and precise information about a quantity
By unit of length and distance and conversion ,we can say that SI base unit for length is meter.
meter
no, the base unit for any sort of distance or length is meters
The base SI unit of distance is the meter.
The metre.
By unit of length and distance and conversion ,we can say that Base unit of length is meters (m).
In the metric system it is the meter. Also, Kilometer
Well, in the metric system, the base unit for distance is the meter. If that is the unit to which you refer, then there are 1000 milimeters in one "unit", or meter.
The remote control sends a radio signal to the base unit, and the base unit interprets the signal to switch the connected appliance on or off. Some remote control can operate multiple switches from a distance.
The official system of measurements is the SI; it has SEVEN base units.
The metre (meter in the USA) is the base unit of length in the metric system. It is equal to the distance light travels in a vacuum in a time interval of 1/299792458 of a second.
Derived units are simply more complex because they are made up of several (that is, usually, by more than one) base unit. It is just the way they are defined; for example, in the SI, distance and time are base units, while speed is a derived unit (distance / time). You can just as well invent a system of units where - for example - time and speed are base units; in this case, distance would be a derived unit.