Entertainment units are used for storing and displaying entertainment devices. One would have TV's on or in them as well as Blu-ray Players, games consoles and sound systems.
The is only one Metric System. That is the one you would use. The units you use to measure mass is the kilogram (Kg).
There are no "following" units, but I would use metres.
The same units that you use for length and distance. For example, the SI unit would be the meter.
You would use kilograms (kg) to measure someone's mass in metric units.
If one were to use hand lengths, different values would be given, as people have different hand lengths, but SI units are the same value all over the world. That is why they are best.
No. I would use linear units if measuring the swim distance or cubic units if measuring the volume of water. Square units might be useful to see how many people could use the pool before it got crowded but that would depend on whether they were there for swimming or splashing about.
no
If you mean what units, that would be meters.
Feet and inches
Kilometres per hour or miles per hour for a car. You could use the same units for runners but most would use metres per second or feet per second.
There are many,one of them are police and another is fire truck.Police use german shepards, and fire units use dalmations.
To answer that accurately, we will need to know the pairs of units.