Question

suppose a speck of dust in an electrostatic precipitator has Np

Due Dati #1 Begin Date: m02019 12.40:00 pM. online Problem 2: Electrons have a charge of q #-1 602x 1049 C A student observes that a Styrof arm cup has a total charge of Q (10%) -0.86 μο. ▲ 50% Part (a) Write an expression for the number of excess electrons Nin the cup. 50% Part (b) How many excess electrons are in the cup? Gra De N 1.623 1012 Su At (4 sin0 cosO tan0 7 8 9 HOME cota asinO acos0 atan acotan sinhO coshO tanhO cotanh0 END 01 BACKSPACE DELI CLEAR | Degrees o Radians Submit I give up

Answer 1

a)

N = Q/q

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b)

N = 0.86*10^-6 / (1.602*10^-19)

N = 5.368*10^12

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