Question

determine the magnitude of an electric field that will balance the weight of an electron

Answer 1

I can help u!!

qE = mg
therefore
E=mg/q (mass of e- = 9.1*10-31, q= 1.6*10-19 and g= 9.8 )
on simplification u get

E = 55.73*10-12

Hope this helps! Cheers!!