Separation of components of a mixture is done to obtain purity of a substance and remove undesirable components.

According to Newton’s second law of motion. Force = Rate of change in momentum F = m(v-u)/t = 5 (12 – 8)/4 = 5 N

According to the Newton’s second law of motion, resultant force on a body is responsible for its acceleration.

DNA molecules contain the information necessary for building and organizing cells. Functional segments of DNA are called genes. In a cell that is not dividing, this DNA is present as a part of the chromatin material.

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