# physics

An electron (m0 = 9.11 10-31 kg) enters a uniform magnetic field B = 1.7 T, and moves perpendicular to the field lines with a speed v = 0.93c. What is the radius of curvature of its path?

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1. wouldn't magnetic force=centripetal force?

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2. when you describe an objects position, you are describing?
a. how fast is it moving and in what direction
b.how fast its speed is changing
c.the direction in which its moving
d.where it is in relation to a reference point

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posted by jessie
3. so what do you think,Jessie?

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4. ah man. i've got this too. for anyone that can help, the fact that the electron moves at close to the speed of light and thus Einstein's theory of special relativity will effect any lengths (based on the reference point) has to be taken into account. i think. maybe not. but please keep that in mind when answering this

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posted by Kevin

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