Two point charges are placed on the $x$ axis as shown in $($Figure $1).$ The

first charge, $q_1=8\mathrm{.}00nC,$ is placed a distance $16\mathrm{.}0m$ from the origin

along the positive $x$ axis; the second charge, $q_2=6\mathrm{.}00nC,$ is placed a

distance $9\mathrm{.}00m$ from the origin along the negative $x$ axis.

Find the $x-$component of the electric field at the origin, point $O.$

Express your answer in newtons per coulomb to three significant figures, keeping in mind that an $x$ component that points to the right is positive.

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$E_{Ox}=$

N$/$C

Part B

Now, assume that charge $q_2$ is negative; $q_2=-6nC,$ as shown in $($Figure $2).$ What is the $x-$component of the net electric field at the origin, point $O?$

Express your answer in newtons per coulomb to three significant figures, keeping in mind that an $x$ component that points to the right is positive.

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