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Wear protective clothing that resists physical and chemical hazards when exposure may occur. Lab coats are appropriate for minor chemical splashes and solids contamination, while plastic o
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Answer:
In moon rock sample the ratio of the number of stable argon-40 atoms present to the number of radioactive potassium−40 atoms is 7:1. Assume that all the argon atoms were produced by the decay of potassium atoms, with a half-life of 2.5×10^9yr. The age of the rock is
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Answer:Under a microscope the cells of mushrooms, plants, and animals all have visible nuclei animals, because both animals and fungi have to consume living things to get energy and nutrients, whereas, plants use sunlight to make their food.
