Re: TI-H: 92 battery pack expander
[Prev][Next][Index][Thread]
Re: TI-H: 92 battery pack expander
>From: Firepower5@aol.com
>whats the difference between an Ohm and a Watt?
A Watt is a measure of power, an Ohm is a measure of electricle
resistance (and a Mho is a measure of conductance :).
1 Watt is approximately 0.2388 calories per second.
A dietary calorie is equaly to 1000 calories. So, if you
were to expend 200 dietary calories per hour during exersize,
you would be expending about 230 W, about .3 horsepower :)
200 dCal 1000 Cal
-------- * --------
hr dCal 4.1868 Cal
--------------------- * ---------- = 233 Watts
3600 sec Watt
--------
hr
An Ohm is a measure of electrical resistance, and can be
calculated by a form of Ohms law, R = Voltage / Current.
It has nothing to do with power.
Power can be released in the form of heat when an electrical
current flows through a resistance, according to the formula
P = VI^2 (Unless I misremember), where P is Watts, V is volts,
and I is Amps.
200mA (.2 Amps) at 5 volts flowing through a resistance will
expend .2 Watts. Since the voltage and current are known,
the resistance can be calculated to be about 25 Ohms.
----------------------------------
David Knaack <dknaack@genetech.net>
Electroluminescent Backlighting:
http://www.genetech.net/dknaack/index.html
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Follow-Ups: