Most workers in nanotechnology are actively monitored for excess static charge b

Question

Most workers in nanotechnology are actively monitored for excess static charge buildup. The human body acts like an insulator as one walks across a carpet, collecting –50 nC per step. What charge buildup will a worker in a manufacturing plant accumulate if she walks 19 steps?____nC

How many electrons are present in that amount of charge?_____electrons

If a delicate manufacturing process can be damaged by an electrical discharge greater than 1012 electrons, what is the maximum number of steps that any worker should be allowed to take before touching the components?_______steps

Explanation / Answer

charge per step= -50nC = -50 x10-9 C

number of steps= 19

total charge buildup= 19(-50) =950nC

charge of each electron= -1.6x10-19 C

n (-1.6x10-19) =- 950 x10-9

number of electrons=5.9375x1012

(b) charge of 1012 electrons = 1012 (-1.6x10-19) =-1.6192x10-16 C

charge per step= -50nC = -50 x10-9 C

so number of steps = -1.6192x10-16 / -50 x10-9 =3.2384x10-9

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