A unit of volume such as a litre.
The answer depends on what you want to measure:
In each case, and other characteristics, a different instrument would be used.
A unit of volume such as a litre.
Kilometres
A kilometre. A megametre may be more appropriate but it is not a unit that is used much.
use a measuring cup
A milliliter (mL)
Use the millilitre (ml)
Which unit would you use to measure the water in a full tub?
A kilometre.
Gallons
I wiil use water
Kilometres
pounds
.
the unit you use is Celsius
i would use really cold frest water but ask your phyciyatisct before you use champix
Litres
water.
measureing cup