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My Chemical Engineering Romance

March 18, 2016

Electroconvulsive therapy (ECT): [1]

Max Output Voltage (V) 450 volts
Output Current (I) 0.9 amps
Frequency 70 hertz
Pulse Width 1.5ms (0.0015 seconds)

Playground Slide: Plastic (HDPE) breakdown voltage: 20 kV/mm [2].  Slide is in contact with child (no air gap to increase resistance/reduce current)

Max Output Voltage (V) [2] 20,000 volts
Output Current (I=V/R) [3] 0.2 amps @ 100,000 Ohm dry skin
2 amps @ 10,000 Ohm broken skin
20 amps @ 1,000 Ohm wet skin
Frequency 1-10 hertz (kid gets shocked
every few feet down the slide (skin in contact with HDPE) – you can hear it!
Pulse Width x ms

Child is getting shocked repeatedly all the way down the slide..


Conclusion: If your child is acting up, send them to the playground.

 

[1] http://www.ect.org/resources/machines.html

[2] http://hypertextbook.com/facts/2009/CherryXu.shtml

[3] Under dry conditions, the resistance offered by the human body may be as high as 100,000 Ohms. Wet or broken skin may drop the body’s resistance to 1,000 Ohms,” adding that “high-voltage electrical energy quickly breaks down human skin, reducing the human body’s resistance to 500 Ohms. (Ref.:National Institute for Occupational Safety and Health)

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