How to make a simple manometer
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Pedometer Is used to measure spped of the car
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Mix water in a beaker with sufficient red food coloring to make the water red. Pour about 100 ml of the water into one of the open ends of the manometer. Position a ruler vertically on one side of the manometer. Adjust the ruler's position so that its zero point is level with the surface of the water in the manometer.
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