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I beg to differ. A spark that can jump a gap of 1mm (such as when you zap a friend) is about 15 000V. An electric fence is about 20 000V. ATry putting your hands on them at the lowest voltage you can give it, then slowly up it. It might hurt, but its not actually very dangerous.

Im not sure about this, but just considering it, I believe the walls of the classroom would be the boundaries. This is as far as the system extends, and outside these it is no longer in the domain of the system. Don't take my word for it as i'm just speculating. But anyway, thats my take on it.

There are alot of resistors and zener diodes in those things as well. These pretty effectively lower both voltage and current.

If you use a mac it makes this course and SDD much easier (imo). And cmd+H works a treat when browsing useless websites.

Just out of curiosity, are you using actual software that is cpu based, or are you just hard-programming a microcontroller? If you are using software, are you designing your own circuits or just custom-programming a lego mindstorm kit or the like? Sorry I can't help you with your queries.

This is ironic because a kid in my class asked the teacher almost that exact same question 2 days ago. Got us all stumped.

Not sure about this^ My understanding is that events outside the spacecraft will appear slower to the person inside the spacecraft. BUT... A person outside the spacecraft will be moving relative to the spacecraft, therefore they see events inside the spacecraft slower. I could be wrong. Any...