College physIcs
posted by Lanise .
An electron travels at a speed of 4.0×104 m/s through a uniform magnetic field whose magnitude is 1.4×10−3 T.
What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field are perpendicular? F= N
What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field make an angle of 45 ? F= N
What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field are parallel?
F= N
What is the magnitude of the magnetic force on the electron if its velocity and the magnetic field are exactly opposite? F= N

You don't seem to be willing to take step one in answering these problems yourself.
You should have been taught the laws
F = q V x B and Ampere's law as part of your course work
q is the (negative) electron charge in this case. 
45

"You don't seem to be willing to take step one in answering these problems yourself. "
What good is just knowing a formula? 
drwis is a awful for that answer