If a=60cm , b=80cm , Q=-6nC and q=6nC What is the magnitude of the electric field at point P in the figure?

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the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.