The magnetic force on a moving electric charge is to the perpendicular, electric field
parallel, electric field
perpendicular, magnetic field
parallel, magnetic field

The correct option is: perpendicular, magnetic field

Explanation:

When a charged particle such as an electron, is in motion, magnetic field is produced. The direction of the magnetic field produced by the charged particle can be determined by the right hand rule.

Therefore, the magnetic force experienced by a charged particle in motion is perpendicular to the magnetic field and the velocity.  

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.