Hp 50g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 227)

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:

Thus, the equation we are solving, after combining the different variables in the

directory, is:

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Hp 50g Graphing Calculator Uživatelský manuál Strana 227