LAst physics question for the day. I promise!

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Question

LAst physics question for the day. I promise!

https://s18.postimg.org/54fc4s9o9/compression.png

GlockParrot69 · Answer

@sillybilly123

GlockParrot69 · Answer

please help me!! :)

Sam · Answer

I have no idea why they gave the width of the magnetic field

GlockParrot69 · Answer

sam how did you get 0.6569 cm?
 this is what am getting. wait let me draw!! :)

GlockParrot69 · Answer

|dw:1520447656173:dw|

Sam · Answer

You plugged in the wrong numbers, 'v' is the velocity of the electron, m/s, where 'B' is the magnetic force and has a unit T, tesla

GlockParrot69 · Answer

no im talking about at the very bottom when calculating the radius

Sam · Answer

Check your calculator, $m_e \times v^2=8.199\times 10^{-18}kgm^2/s^2$

GlockParrot69 · Answer

oh i got it. i think i know where i made the mistake. Thanks sam. <3

GlockParrot69 · Answer

i forgot to square the 3.00X10^2 T

GlockParrot69 · Answer

so 9.11 X 9 does equal 81.99

GlockParrot69 · Answer

yeah thanks fam!!

Sam · Answer

Sure thing :)