Siti wants to choose a material for a swimming cap. The material must be able to stretch and prevent water from reaching her hair. Which properties should she look for?
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Worked Solution
Step 1: Identify the requirements: stretch (flexibility) and keep hair dry (waterproof).
Step 2: Match with material properties.
Step 3: Rubber or silicone are flexible and waterproof, making them ideal for swimming caps.
Correct answer: Flexible and Waterproof
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