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Checking Pore Connections in Two Panels 4 questions

Checking Pore Connections in Two Panels

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A workshop removes an equal amount of soluble filler from two model panels. The spaces left by the filler become empty pores. Each panel has a total volume of 20 cm3. A separate reading gives the remaining solid volume. Water can pass through the panel only if there is a connected path from one face to the other.

PanelRemaining solid volume (cm3)Water reaching the far face during the test (mL)
P140
Q143

Question 1

Which panel has evidence of a connected path through it?

  1. P only
  2. Q only
  3. Both panels
  4. Neither panel

Question 2

Calculate the empty pore volume and its fraction of the total for each panel.

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Question 3

A student predicts the same water passage because the pore volumes are equal. Explain how the pore arrangement can account for the different readings.

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A follow-up shows that water enters part of P but still never reaches the far face during the test.

Each panel has a left entry face and a right far face. The white pore in Model 1 touches neither face. In Model 2 it touches only the entry face. In Model 3 one pore connects both faces.
Three possible cross sections. White spaces inside the shaded panels represent pores.
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Question 4

Which pictured model fits the follow-up? Use both faces to explain your choice.

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