What is the force exerted on a charge of 2.5 μc moving perpendicular through a magnetic field of 3.0 × 102 t with a velocity of 5.0 × 103 m/s?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

Two charged particles, q1 and q2, are located on the x-axis, with q1 at the origin and q2 initially at x1 = 12.2 mm. in this configuration, q1 exerts a repulsive force of 2.62 µn on q2. particle q2 is then moved to x2 = 18.0 mm. what is the force (magnitude and direction) that q2 exerts on q1 at this new location? (give the magnitude in µn.)

Astep up transformer has 250 turns on its primary and 500 turns on it secondary. when the primary is connected to a 200 v and the secondary is connected to a floodlight that draws 5a, what is the power output? show all of your work.