A 7.50- Solution First, you write your variables: Q = 7.50 x 10^-6 C E = 1250 N/

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First, you write your variables: Q = 7.50 x 10^-6 C E = 1250 N/C --->+x direction B = 1.02 T ------>+z direction Fnet = 6.25x 10^-3 N ----->+x direction Fnet = Fe - Fb =qE - qvB Solve for v so v = (1/B)(E - (Fnet/q)) v= 408.49v once you get the value for velocity. You need to know which direction it's going. You know +x direction for E, +z direction for B and +x for Fnet. Do the right hand rule where: your right thumb goes toward the Fnet, then your index finger points to B (z direction) Then curl your middle,ring, and pink 90 angle. This shows where v is going which is -y direction.

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