Question
What is a simple pendulum? Explain how does it perform oscillatory motion.

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air, handpumps, cholera, water, large, ground.
A very _______ number of our people defecate in the open. It may cause _______ pollution and soil pollution. Both the surface water and _______ water get polluted. _______ water is the source for wells, tubewells and _______. Thus it becomes the most common route for _______ borne diseases like _______, dysentery, etc.