Using Solve In Program - HP 33s Owner's Manual

Now calculate the change in pressure of the carbon dioxide if its temperature
drops by 10 °C from the previous example.
Keys:
(In RPN mode)
e
L
º s
H
Û
P
¥
¥
¥
Ï Ã
10
¥
h Ã
L

Using SOLVE in Program

You can use the SOLVE operation as part of a program.
If appropriate, include or prompt for initial guesses (into the unknown variable and
into the X–register) before executing the SOLVE variable instruction. The two
instructions for solving an equation for an unknown variable appear in programs
as:
 label
 variable
File name 33s-E-Manual-1008-Publication(1st).doc
Printed Date : 2003/10/8
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Solving and Integrating Programs
Page : 386
Size : 13.7 x 21.2 cm
Description:
Stores previous pressure.
Selects program "H."
Selects variable P; prompts for V.
Retains 2 in V; prompts for N.
Retains .005 in N; prompts for R.
Retains .0821 in R; prompts for T.
Calculates new T.
Stores 287.1 in T; solves for new
P.
Calculates pressure change of the
gas when temperature drops from
297.1 K to 287.1 K (negative
result indicates drop in pressure).
14–5