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Hello!

I'm having trouble subtracting two equations, I'm not really sure how to go about it.

[itex]\\

\frac{4\pi r^3}{3}(\rho_1 - \rho_2)g - 6\pi r\eta v_0 = 0\\

\frac{4\pi r^3}{3}(\rho_1 - \rho_2)g - 6\pi r\eta v_1 - qE = 0[/itex]

For clarification, there are three different equations used.

[itex]\\

F_g = \frac{4\pi r^3}{3}(\rho_1 - \rho_2)g \\

F_f = 6\pi r\eta v_0\\

F_e = qE

[/itex]

Which gives:

[itex]\\

F_g - F_f = 0 \\

F_g - F_f - F_e = 0

[/itex]

This, in turn, results in [itex]F_e[/itex], or [itex]qE[/itex], but I'm sure that's wrong.

How should I go about solving this?

Thanks in advance.

I'm having trouble subtracting two equations, I'm not really sure how to go about it.

[itex]\\

\frac{4\pi r^3}{3}(\rho_1 - \rho_2)g - 6\pi r\eta v_0 = 0\\

\frac{4\pi r^3}{3}(\rho_1 - \rho_2)g - 6\pi r\eta v_1 - qE = 0[/itex]

For clarification, there are three different equations used.

[itex]\\

F_g = \frac{4\pi r^3}{3}(\rho_1 - \rho_2)g \\

F_f = 6\pi r\eta v_0\\

F_e = qE

[/itex]

Which gives:

[itex]\\

F_g - F_f = 0 \\

F_g - F_f - F_e = 0

[/itex]

This, in turn, results in [itex]F_e[/itex], or [itex]qE[/itex], but I'm sure that's wrong.

How should I go about solving this?

Thanks in advance.

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