vector containing
    the <i>dx</i> values for the corresponding material. It should also be
    noted that in the above equations, only the portion of <i>Tfvec</i> that
    refers to Material A is used in the first equation and only the portion
    that refers to Material B is used in the second equation.

<br>
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<div class="instructions">
        Instructions
</div>

<p>
    To use this block:
    <ul>
        <li> Connect the inputs to the correspond