Aparticle with charge q and kinetic energy ke travels in a uniform magnetic field of magnitude b. if the particle moves in a circular path of radius r, find expressions for its speed v and its mass m. (use any variable or symbol stated above as necessary.) (a) expression for its speed (do not use m in your answer.) v = (b) expression for its mass (do not use v in your answer.) m =

a)

b)

Explanation:

Given that

Charge = q

Magnetic filed = B

Radius = R

We know that kinetic energy KE

                   ----------1

m v² = 2 .KE            

The magnetic force F = q v B

Radial force

For uniform force these two forces should be equal

q v B R =m v²

q v B R =  2 .KE

Now put the velocity v in the equation

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it

you can cut your hand off if your not