Hp 50g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 664)

100

101

Page 21-17

You can also separate the input data with spaces in a single stack line rather

than using `.

Programs that simulate a sequence of stack operations

In this case, the terms to be involved in the sequence of operations are assumed

to be present in the stack. The program is typed in by first opening the program

containers with ‚å. Next, the sequence of operations to be performed is

entered. When all the operations have been typed in, press ` to complete

the program. If this is to be a once-only program, you can at this point, press

μ to execute the program using the input data available. If it is to be a

permanent program, it needs to be stored in a variable name.

The best way to describe this type of programs is with an example:

Example

: Velocity head for a rectangular channel.

Suppose that we want to calculate the velocity head, h

, in a rectangular

channel of width b, with a flow depth y, that carries a discharge Q. The

specific energy is calculated as h

= Q

/(2g(by)

), where g is the acceleration

of gravity (g = 9.806 m/s

in S.I. units or g = 32.2 ft/s

in E.S. units). If we

were to calculate h

for Q = 23 cfs (cubic feet per second = ft

/s), b = 3 ft, and

y = 2 ft, we would use: h

= 23

/(2⋅32.2⋅ (3⋅2)

). Using the RPN modethe

calculator, interactively, we can calculate this quantity as:

2`3*„º32.2*

2*23„º™/

Resulting in 0.228174, or h

= 0.228174.

To put this calculation together as a program we need to have the input data

(Q, g, b, y) in the stack in the order in which they will be used in the

calculation. In terms of the variables Q, g, b, and y, the calculation just

performed is written as (do not type the following):

y ` b *„º g *2* Q „º™/

1 2 ... 659 660 661 662 663 664 665 666 667 668 669 ... 886 887

Komentáře k této Příručce

Žádné komentáře

Hp 50g Graphing Calculator Uživatelský manuál Strana 664

Komentáře k této Příručce

Související produkty a manuály pro Kalkulačky, organizátory Hp 50g Graphing Calculator