What is the difference between an atom in its ground state and the same atom in an excited state?.

Which of the following statements is the best answer regarding training for struck by hazard

How should the syntax in this sentence be changed, if at all? the scientists spent years analyzing the results of numerous medical studies meant to identify the cause of the disease. no change the scientists spent years looking at the results of a variety of different medical studies meant to locate the cause of the disease. the scientists spent years reviewing medical study results to find the cause of the disease. the scientists spent years studying the results of many medical studies in order to uncover the cause of the disease.

of the following words means "to make something unnecessary"? who talke constantlyor in na