Siti tried to push the plunger of a syringe filled with substance X. She found that she could not push the plunger in at all. What could substance X be?
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Worked Solution
Step 1: Identify that the plunger cannot be pushed (substance is incompressible).
Step 2: Recall that solids and liquids cannot be compressed, while gases can.
Step 3: Water and oil are liquids; air is a gas.
Step 4: Therefore, X must be a liquid.
Correct answer: Water or oil
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