Siti inverted a plastic cup with a hole at the bottom and pushed it straight down into a basin of water. She observed that water entered the cup. Why?
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Worked Solution
Step 1: Air takes up space inside the cup.
Step 2: When pushed down, air is usually trapped, preventing water from entering.
Step 3: However, the hole allows air to escape.
Step 4: As air leaves, water moves in to take up the space.
Correct answer: Air escaped through the hole.
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