1. The problem statement, all variables and given/known data A magnet produces a 0.90 T field between its poles, directed to the east. A dust particle with charge q = -1.0 10-18 C is moving straight down at 0.70 cm/s in this field. What is the magnitude and direction of the magnetic force on the dust particle? 2. Relevant equations f=qvb 3. The attempt at a solution (1.0e-18)(.007)(.90)=-6.3e-21 which is wrong I followed the same format as someone else and my answer is wrong. can you help point out what the mistake is? thanks.