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The amount of force needed to keep a 0.5 kg football moving at a constant speed of 8 m/s on frictionless ice?

A.) 5N
B.) 10N
C.) 4N
D.) 0N
E.) 1N

The production of cells during mitosis into specialized function is recombination or differentiation

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

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