Tuesday, September 28, 2010

Pros and Cons to powering systems

Here I am, here to talk about pros and cons to different powering systems.

Body heat:

First off, you must understand that there must be a warmer end and a colder end for a thermoelectric generator (what's used to make electricity from body heat) to work.  The heat in the warmer end excites electrons, which have no atoms to bond to, so they start flowing.  By the second law of thermodynamics, heat will flow from a warmer object to a colder one.  The electrons will follow this law and flow to the colder end.  Electricity is just the flow of electrons.  This works as long as there is sufficient difference in the user's body temperature and the temperature outside.  The amount of power you'd get is a bit unpredictable, and it might not work as well on hot days or patients prone to hypothermia, though.

ATP:

Works well as a rechargeable battery.  It could be used to store the excess energy from other systems.  Not so great on its own, though, because you would need something to "recharge" it.  In the body, an enzyme called ATP synthase recharges it.  ATP synthase is located in the mitochondrial membrane.

Glucose fuel cells:

Works pretty well, but what about diabetics?  If they already have low blood sugar, think about what could happen if you lower it even more.

For vital things like a heart, you might want to have backups in case the regular power system loses its power source.  For instance, if you had a solar-powered pacemaker and you don't currently have access to sun, you are in trouble.  If it was programmed to revert to glucose if there's no sun, you would be safer.


This is a post from Alpha Rex.

The wires on the NXT are like telephone jacks, with one difference: the snap-connector on top is to the side to prevent kids from plugging their NXTs into the telephone service.

Briiiiiiiinnnnnnnng!  Briiiiiiiiiiiiinnnnnnnnnnnnnng!

Person: Hello?
NXT: Hello.
Person: Who is this?
NXT: Alpha Rex.
Person:AAAAAAAAAUUUUUUUUUUUGGGGGGGGGHHHHHHH!  ALIEN ROBOTS ARE INVADING!!!!!!!!!!!!
NXT: Resistance is futile.

1 comment:

Paw Paw said...

What is ATP?