4-20mA is used because in that way we can distinguish a ZERO value signal from a malfunction in the measuring circuit (i.e. disconnected cable).
What advantages did the Romans find in using a cross vault instead of a barrel vault?
Instead of using W as a variable in your model, you use log(W).
a=pi r²a=pi (d/2)²
There is none.
There is no such example. If you cannot use an exact fraction then there will not be an exact decimal that you can use instead. And, if you are using an approximate decimal, you could use an approximate fraction instead.
Instead of using I in a essay paper what word do you use?
Instead of using the word "ladies," you can say "women" or "individuals."
In a range name instead of using a space or hyphen, use a?
When you use 'her' instead of 'girl', you are using a pronoun.
Make the pastry using shortening, instead of lard.
instead of using through
You write sentences using "he" or "she" or "they" instead of using "I" or "we."
No!
Instead of feeding the pigs glop, I fed them cheese.
You could not use lightning instead of batteries.
What advantages did the Romans find in using a cross vault instead of a barrel vault?
To produce light using electricity instead of using fire.