The second law of thermodynamics is a statement of the law of conservation of energy say that heat cannot be completely converted into mechanical energy
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What is the most common blood type?: The most common blood type would be O Positive (O+). About 39 percent of the population has this blood type.
What is the least common blood type?: The least common blood type would be AB Negative (AB-). About 1 percent of the population has this blood type.
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-Detector
The water cycle and the oxygen cycle