hp 49g+_user's guide_English_E_DCVL5300427_V2

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The display shows what is called a tagged value, Vm:359.0394. In here,
Vm, is the tag of this result. Any arithmetic operation with this number will
ignore the tag. Try, for example: ‚¹2*„î`, which
produces:
The same operation in RPN mode will require the following keystrokes (after
the value of Vm was extracted from the constants library): 2`*‚
¹
Special physical functions
Menu 117, triggered by using MENU(117) in ALG mode, or 117 ` MENU
in RPN mode, produces the following menu (labels listed in the display by
using ‚˜):
The functions include:
ZFACTOR: gas compressibility Z factor function
FANNING: Fanning friction factor for fluid flow
DARCY: Darcy-Weisbach friction factor for fluid flow
F0λ: Black body emissive power function
SIDENS: Silicon intrinsic density
TDELTA: Temperature delta function
In the second page of this menu (press L) we find the following items:
In this menu page, there is one function (TINC) and a number of units
described in an earlier section on units (see above). The function of interest is: