a surface of marble is very smoot and plane does it has friction less surface comment on it
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The 10% of energy available for transfer from one trophic level to the next in an ecosystem is in the form of chemical energy. The autotrophs (or producers) capture the energy in sunlight and convert it into chemical energy.
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Frictionless planes do not exist in the real world. However, if they did, one can be almost certain that objects on them would behave exactly as Galileo predicts. Despite their nonexistence, they have considerable value in the design of engines, motors, roadways, and even tow-truck beds, to name a few examples.
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