Gene Heskett <ghesk...@shentel.net>: > On Tuesday 19 July 2016 13:46:37 Lawrence D’Oliveiro wrote: >> What is this “watt” of which you speak? > > A unit of electrical power, simplified to 1 volt at 1 amp = 1 watt > when that currant is passed thru a 1 ohm resistor. But since the > majority of radio frequency stuff is designed for a characteristic > impedance of 50 ohms, then the currant is 20 milliamps while the > voltage rises to 50 volts.
Where I live, it is mandatory for stores to display not only prices but also prices per unit. Unfortunately, the "unit" for batteries is a piece. Thus, it is not possible to make price comparisons between different battery brands. I'd love it if batteries were priced per joule, or even per kilowatt-hour. According to <URL: http://www.allaboutbatteries.com/Energy-tables.html>, an alkaline AA battery holds 0.00260 kWh. Amazon is selling the Duracell brand at USD 18.38/34-pack, or at about USD 200/kWh. Marko -- https://mail.python.org/mailman/listinfo/python-list
