Talk:Watt

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Request to add KWh_e and KWh_h

The terms are used in CHP to define the generators output in heat and electricity. User:ralph86 14 apr 2009

Power

Power is the product of force and speed. It takes a bigger motor to raise an elevator at 5 metre/second than at 1 metre/second. We should be consistent with the defintion of power when defining the watt. A joule/second is a newton-metre/second, or in other words, 1 newton moving something at a speed of 1 metre/second. --Wtshymanski (talk) 14:23, 3 August 2011 (UTC)[reply]

For example, just looking at stuff I can find for free on Google Books and since my physics textbook is at home: pg 44 of Applied dimensional analysis and modeling by Thomas Szirtes and P. Rózsa says 1 watt is exactly 1 newton times (1) metre per second. There would be others. --Wtshymanski (talk) 14:35, 3 August 2011 (UTC)[reply]

The above is correct elementary high-school physics. Ccrrccrr (talk) 16:18, 3 August 2011 (UTC)[reply]

Oh, this was never about the physics, really. --Wtshymanski (talk) 18:11, 3 August 2011 (UTC)[reply]

Link to Parkers Car Guide

I made the note that the power of a medium-sized family car lies between 50 kW and 250 kW. I have twice had to revoke a change when somebody has replaced the 50 kW with 150 kW. I don't know about American cars, but in Europe 50 kW is a fairly small car - I have recently bought a 63 kW car (four seater, four doors, 1.2 L engine, suits a retired couple or a young married couple with oneor two small children). In Europe, a car with a 150 kW engine is certainly towards the higher end of "family cars". I added the link to Parkers so that I have a reference against which to back my claims. For the record, Parkers is one of the most reputable lists of car prices in the UK. Martinvl (talk) 16:22, 10 August 2011 (UTC)[reply]

Spelling of symbols

I note that symbols up to "kW" are spelled with a small first letter in the article, while those from "MW" up have a capital letter in first place.

Is there any reason that makes sense for this inconsistency? — Preceding unsigned comment added by 133.2.9.40 (talk) 23:08, 21 August 2011 (UTC)[reply]

I believe the prefixes for multipliers less than 1,000 were created earlier (by the General Conference on Weights and Measures) than the larger multipliers. Jc3s5h (talk) 23:59, 21 August 2011 (UTC)[reply]

UK & US household consumption

Given that US households use about twice the energy of a UK house, I thin it appropriate that both be included. The wording is perhaps a little POV, so I will change that, but keep both figures in place. Martinvl (talk) 08:49, 11 November 2011 (UTC)[reply]

I believe you are being inconsiderate of the reader. The point of the paragraph is to show that annual energy consumption is actually a unit of power, not a unit of energy, and also, to give an order-of-magnitude concept of how much a kilowatt is. The consumption of an average US household is merely a convenient example. Trying to stick in the power consumption of your favorite country is off-topic and distracting to the reader. There is no cause to insert the average household power consumption of more than one country in this section. Remember, this article is not about household power consumption around the world. Jc3s5h (talk) 13:17, 11 November 2011 (UTC)[reply]

I only came to this in providing a reference for what looked like a guestimate figure for UK consumption - the reference to the UK consumption was already an established part of the paragraph. If the US figure is to stay then I would strongly support the inclusion of the UK figure . Taking a global view , the USA figure is an extreme and yet it appears to be presented as a norm. I suggest that either we ensure the US figure is presented as the most profligate use of energy or it is balanced by a least one figure from a developed country with a more moderate use of energy. Velella ^{Velella Talk} 13:35, 11 November 2011 (UTC)[reply]

If someone knows an average figure for developed countries, or can demonstrate that a particular country is in the middle of the range of developed countries, I would prefer to see such a figure replace the US figure. Jc3s5h (talk) 13:45, 11 November 2011 (UTC)[reply]

I would prefer to remove all references to average household electricity consumption - after all we are trying to give the reader a "feel" for what a kilowatt is - IMO, many people have no feel for how much electricty their house is consuming - do you have air conditioning? Do you use electrical heating? They would rather be told that they are using the equivalent of four single-bar heaters than the other way round. Martinvl (talk) 20:47, 11 November 2011 (UTC)[reply]

Include Yottawatt

Yottawatt redirects here but there's no subtitle of it. Perhaps someone can write a paragraph on it? thx 71.197.67.191 (talk) 04:03, 1 February 2012 (UTC)[reply]

Request to add KWhe and KWhh