Curvature radius of alpha and beta particles

[ProPatto16]

Homework Statement

An alpha particle and beta particle, each with kinetic energy 35keV , are sent through a 1.1T magnetic field. The particles move perpendicular to the field.

Homework Equations

no idea.

The Attempt at a Solution

there's nothing on curvature radius in my textbook. from what i can find on the internet it has something to do with the velocity of each of the particles which i can find using the kinetic evergy and relevant masses.
a beta particle is just an electron, which has mass 9.1094*10^-31, using the given energy, gives a velocity of 1.1*10⁸m/s

an alpha particle is a helium nucleus, with mass 6.6447*10^-27
giving a velocity of 1.299*10⁶m/s

but i got no idea what to do with the figures..

 

[pat666]

mv^2/r = qvB
mv = qrB
sqrt(2mE) = qrB

MASTERING PHYSICS SUCKS!

 

[ProPatto16]

word. thanks bruh.