I am guessing you can use Gallons.
U.S. customary is a system of units that measures the same things that the SI (Systeme International) system of units measure. U.S. Customary is different though, in the way it is derived. The SI system is based on 6 basic concepts, Mass (kg), Time (s), Length (m), Temperature (K), Luminous Intensity(lm), and Electric Current (A). Because mass does not change, SI is considered an absolute system. U.S. customary is based on the pound, which is a unit of force, similar to the Newton in SI units. Because force can change depending on various conditions, U.S. Customary is considered a derived system of measurements. For example, the U.S. Customary unit for mass is the slug. A slug is defined as the amount of mass that can be accelerated at 1ft/s2 by 1 lb. of force. A Newton on the other hand is defined in terms of kilograms, meters, and seconds. This is why if you weigh 150 lb., your mass is only 4.66 slugs or 68.0 kg, and therefore, 667.08 Newtons.
"What do you measure (when) you measure..." ? When you measure an object's temperature, you are measuring the amount of heat the object emits (gives off). There is no such thing as cold, only the absence of heat.
Litre
Percentage error.
millilitres
Measuring cup
you dont count you measure it
5 Gallons
Gallons.
The volume of water in liters or gallons is the best measure to describe the amount of water in a home aquarium. This measurement helps determine correct dosages for treatments, stocking levels for fish, and equipment needs such as filters and heaters.
Litres for a domestic aquarium, kilolitres for a large [public] aquarium.
Weigh the amount of water he can displace.
The customary amount to tip an airport shuttle driver is typically around 15-20 of the total fare.
To estimate the magnitude or amount of damage it could cause to infrastructure and environment.
The customary amount to tip at a full-service gas station is typically around 1 to 2 per car.
If you are trying to measure concentration of salt in water you would be measuring molarity which is moles / liter. Moles are equal to grams of salt / the MW of salt (and if you mean NaCl then the MW is 58.44 g/mol). Density is a ratio of mass to volume (mass / volume or kg/m^3)
It is not customary to tip a gas attendant in the United States. However, if you choose to tip, a common amount is 1 to 2.