what is acceleration
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Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing , but not always . When an object moves in a circular path at a constant speed,it is still accelerating, because the direction of its velocity is changing.
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the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
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