C R; Darcy; Date - HP 48gII Advanced User's Reference Manual

C R

Type: Command
Description: Complex to Real Command: Separates the real and imaginary parts of a complex number or
complex array.
The result in item 2/ level 1 represents the imaginary part of the complex argument.
!°
Access:
Input/Output:
See also: R C, RE, IM

DARCY

Type: Function
Description: Darcy Friction Factor Function: Calculates the Darcy friction factor of certain fluid flows.
DARCY calculates the Fanning friction factor and multiplies it by 4. x
– the ratio of the conduit roughness to its diameter. y
uses different computation routines for laminar flow (Re 2100) and turbulent flow (Re > 2100).
x and y
e/D Re
both numbers must be greater than 0.
...µ
Access:
Input/Output:
See also: FANNING

DATE

Type: Command
Description: Date Command: Returns the system date.
...Ó
Access:
...&9
Flags: Date Format (-42)
Input/Output:
See also: DATE+, DDAYS, TIME, TSTR
DATE
Type: Command
Description: Set Date Command: Sets the system date to date.
date has the form MM.DDYYYY or DD.MMYYYY, depending on the state of flag –42. MM is
month, DD is day, and YYYY is year. If YYYY is not supplied, the current specification for the
year is used. The range of allowable dates is January 1, 2000 to December 31, 2090. Inputs
between January 1, 1991 and December 31, 1999 are silently rejected by
reported and the system date is left unchanged.
The result in item 1/level 2 represents the real part of the complex argument.
L
TYPE C R
Level 1/Argument 1
(x, y)
[ C-array ]
must be real numbers or unit objects that reduce to dimensionless numbers, and
DARCY
Level 2/Argument 1 Level 1/Argument 2
x / D
e
TOOLS DATE
DATE
Level 1/Argument 1
( °is the left-shift of the Nkey).
Level 2/Item 1
x
[R-array ]
1
is the Reynolds number. The function
Re
y
Re
(Ó is the right-shift of the 9 key).
Full Command and Function Reference 3-39
Level 1/Item 2
y
[R-array ]
2
is the relative roughness
e/D
Level 1/Item 1
x
Darcy
Level 1/Item 1
date
; no error is
DATE