The unit for pounds, lb, actually comes from the Latin Libra meaning scale or balances.
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Pounds can refer to both weight measurement (lb) and British currency (£). It is important to specify which context is being referred to when using the term pounds to avoid confusion.
Ice exerts a pressure of around 35,000 to 40,000 pounds per square inch in a pipe. This pressure is due to the expansion of water when it freezes, causing the ice to exert a significant force on the walls of the pipe.
In free expansion, the external pressure is zero, i.e. work done is zero. Accordingly, free expansion is also called irreversible adiabatic expansion.
Isentropic expansion is a process in which there is no change in entropy, while isenthalpic expansion is a process in which there is no change in enthalpy. In practical terms, isentropic expansion is adiabatic and reversible, while isenthalpic expansion occurs when there is a change in phase without any heat transfer.
There are 4.25 pounds in 4.25 pounds.
One trillion pounds = 1,000,000,000,000 pounds