A point charge of $-3\mathrm{.}00\backslash$mu C

is located in the center of a spherical cavity of radius $6\mathrm{.}90$ cm

inside an insulating spherical charged solid. The charge density in the solid is $7\mathrm{.}35\backslash$times

$104$

C$/$m$3$

$.$

Part A

Calculate the magnitude of the electric field inside the solid at a distance of $9\mathrm{.}40$ cm

from the center of the cavity.

Express your answer with the appropriate units.

Activate to select the appropriates template from the following choices. Operate up and down arrow for selection and press enter to choose the input value typeActivate to select the appropriates symbol from the following choices. Operate up and down arrow for selection and press enter to choose the input value type

E

$=$

nothing

nothing

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Part B

Find the direction of this electric field.

radially outward

radially inward