HP 48gII Graphing Calculator Manual do Utilizador descarregar pdf (Página 223)

Example 3 – Flow in a pipe

You may want to create a separate sub-directory (PIPES) to try this example.

The main equation governing flow

in a pipe is, of course, the Darcy-Weisbach

equation. Thus, type in the following equation into EQ:

Also, enter the following variables (f, A, V, Re):

In this case we stored the main equation (Darcy-Weisbach equation) into EQ,

and then replaced several of its variables by other expressions through the

definition of variables f, A, V, and Re. To see the combined equation, use

EVAL(EQ). In this example we changed the display setting so that we can see

the entire equation in the screen:

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HP 48gII Graphing Calculator Manual do Utilizador Página 223