A negative point charge −q is at the center of a hollow insulating spherical shell, which has an inner radius r1 and an outer radius r2. There is a total charge of +4q spread uniformly throughout the volume of the insulating shell, not just on its surface. Determine the electric field for the following. (use any variable or symbol stated above along with the following as necessary: r and ε0. ).

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The smokey mountains have over 2,100 miles of rushing mountain streams and rivers that flow through the park. in each mile lives a diverse community of native fish, amphibians, insects, and larvae, some of which are found only in the southern appalachians. park managers and scientific researchers test many factors such as fish populations, the watersheds and water tests to determine a) too many lizards are present b) the water quality of the stream c) rainwater is running into local streams d) if visitors to the park are overstaying their welcome

Logistic growth curves are density-dependent. select the best answer from the choices provided t f