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What units do you use in labeling area in US Customary System?
square feet
What should you do to change a value in SI units to a value in U.S. customary units?
What should you do to change a value in SI units to a value in U.S. customary units?
What does the customary system measure?
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.
If a person tells you she is 6 feet tall, is she basing that measurement on customary units or metric units?
Feet are a measurement in the Imperial system. If she was using Metric it would be in meters, not feet.
How do you change units in the customary system?
Wit great difficulty. You need to know a huge list of conversion factors and that is one of the reasons that most sensible people adopted the SI system.
