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your right, i recall getting 2450ish, nearly all the reactant is consumed

Angle is very necessary, your not given the LENGTH of the wire, your given the height of the magnetic field, trigonometry --> sin(30)= 0.2/length ---> length = 0.2/sin(30)

Yea this is one of those moments where I give myself an eternal facepalm >_<, didnt do math this year, did it last year, prolly woulda saw this differently then =.= To answer the second part: Then I'd say your correct ^.^, current = rate of charge moving You are wrong about the first part...

These are what I put and the reasoning behind it...: 1) D - DC generator due to split ring comm. 2) A - The speed of light is the length travelled by light in a vaccum in 1/299 792 45 of a second 3) C - The cathode beam converts kinetic energy on collision exciting the nucleus causing it to glow...