Need some assistance 3.1 mA....

[Lazmarr]

So basically I need some of your expertise, does 3.1 mA pose a serious health risk especially to small children?

 

I may also need some of your expertise in my maybe next to come topic...especially you science people out there

[werto165]

This is a rather scary post... 

[LemonSpice]

So basically I need some of your expertise, does 3.1 mA pose a serious health risk especially to small children?

 

I may also need some of your expertise in my maybe next to come topic...especially you science people out there

what voltage and whyyyyy

[Lazmarr]

what voltage and whyyyyy

I think 0.248 volts.....but I had to use an online calculator for that (External Resistence is 80 ohms)

Tis for you to find out in the next topic

[LemonSpice]

I think 0.248 volts.....but I had to use an online calculator for that

Tis for you to find out in the next topic

that many volts and that many miliamps could do nothing what are you doing

[W-L]

So basically I need some of your expertise, does 3.1 mA pose a serious health risk especially to small children?

 

I may also need some of your expertise in my maybe next to come topic...especially you science people out there

 

It takes somewhere around 100mA at the heart to be fatal but it's all about the amperage and how well it travel through you to a grounded surface. You can have what can be consider high voltage discharge through you but with a small number of amps there will be no issues, but a nasty static shock. It has to do with Ohm's law where I=V/R where to body is a approx constant R, and the current is dependent on the voltage.

[Poohy14]

This graph might help you out, it varies from person to person though.

 

I had to know this since I am messing with 50Amps working in a panel at school. Dont need to worry about volts as much since amps is the one that can kill you with less. 240VAC isn't bad to touch, just really scares you when it happens (Personal Experience).

[Norman_the_Owl]

This is vaguely worrying.

Don't go tasing children pls

[Lazmarr]

This is a rather scary post... 

what voltage and whyyyyy

I think 0.248 volts.....but I had to use an online calculator for that (External Resistence is 80 ohms)

Tis for you to find out in the next topic

It takes somewhere around 100mA at the heart to be fatal but it's all about the amperage and how well it travel through you to a grounded surface. You can have what can be consider high voltage discharge through you but with a small number of amps there will be no issues, but a nasty static shock. It has to do with Ohm's law where I=V/R where to body is a approx constant R, and the current is dependent on the voltage.

This is vaguely worrying.

Don't go tasing children pls

Ok thank you very much all

 

Basically I'm an Ambassador for an organisation called STEMNET (Science, Technology, Engineering and Mathematics Network), in the UK, where we go around schools and colleges creating opportunities that inspire young people, kids from KS2 up to GCSE and A-Levels, into the areas and subjects surrounding STEM.

I'm part of the Science division, mainly biology, and since many of the activities are chemistry based I was thinking of activities that could be used to show more of the biology side of things taht would be safe for young children to carry out.

So I started thinking and looking and found an idea taht could work....MICROBIAL FUEL CELLS, using the power of Lactobacilli (found in milk) to generate electricity

So basically this device outputs 3.1 mA just from the ion exchange between the anaerobically respiring bacteria (anode) and the cathode which generates electricity

So this seemed pretty awesome since it focusses on the abilities of the bacteria but also bridges it into chemistry and Physics