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प्रश्न
A spiral cut from a thick chart paper is pivoted at 0 and is held slightly above a burning candle You will notice that the spiral starts moving. Explain.
टीपा लिहा
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उत्तर
The spiral starts moving because due to the flame of the candle the spiral heats up and expands. While expanding, the spiral tries to create space for the extension in length, and an outward pull is created which causes the spiral to move.
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