United States customary units are a system of measurements commonly used in the United States. The U.S. customary system developed from English units which were in use in the British Empire before American independence. Consequently most U.S. units are virtually identical to the British imperial units. However, the British system was overhauled in 1824, changing the definitions of some units used there, so several differences exist between the two systems.
The majority of U.S. customary units were redefined in terms of the meter and the kilogram with the Mendenhall Order of 1893, and in practice, for many years before. These definitions were refined by the international yard and pound agreement of 1959. The U.S. primarily uses customary units in its commercial activities, while science, medicine, government, and many sectors of industry use metric units. The SI metric system, or International System of Units is preferred for many uses by NIST
The system of imperial units or the imperial system (also known as British Imperial) is the system of units first defined in the British Weights and Measures Act of 1824, which was later refined and reduced. The system came into official use across the British Empire. By the late 20th century, most nations of the former empire had officially adopted the metric system as their main system of measurement, but some Imperial units are still used in the United Kingdom and Canada.
In physics, mass (from Greek μᾶζα "barley cake, lump [of dough]") is a property of a physical system or body, giving rise to the phenomena of the body's resistance to being accelerated by a force and the strength of its mutual gravitational attraction with other bodies. Instruments such as mass balances or scales use those phenomena to measure mass. The SI unit of mass is the kilogram (kg).
For everyday objects and energies well-described by Newtonian physics, mass has also been said to represent an amount of matter, but this view breaks down, for example, at very high speeds or for subatomic particles. Holding true more generally, any body having mass has an equivalent amount of energy, and all forms of energy resist acceleration by a force and have gravitational attraction; the term matter has no universally-agreed definition under this modern view.
The Rockefeller Drug Laws are the statutes dealing with the sale and possession of "narcotic" drugs in the New York State Penal Law. The laws are named after Nelson Rockefeller, who was the state's governor at the time the laws were adopted. Rockefeller, a staunch supporter of the bill containing the laws had Presidential ambitions and so wanted to raise his national posture by being "tough on crime." If this strategy worked, he would no longer be seen as too liberal to be elected. He signed it on May 8, 1973.
Under the Rockefeller drug laws, the penalty for selling two ounces (57 g) or more of heroin, morphine, "raw or prepared opium," cocaine, or cannabis or possessing four ounces (113 g) or more of the same substances, was a minimum of 15 years to life in prison, and a maximum of 25 years to life in prison. The original legislation also mandated the same penalty for committing a violent crime while under the influence of the same drugs, but this provision was subsequently omitted from the bill and was not part of the legislation Rockefeller ultimately signed. The section of the laws applying to marijuana was repealed in 1979, under the Democratic Governor Hugh Carey.