On Mon, 21 Aug 2006 13:36:20 +0100, Rob
wrote:

Don Pearce wrote:
On Mon, 21 Aug 2006 08:33:26 +0100, Rob
wrote:

Don Pearce wrote:
On Sun, 20 Aug 2006 22:38:31 +0100, Rob
wrote:

Um - per means 'for each', unless you have a more accurate definition.
You told me to use 'for', or 'FOR', in the first place. Each means every
one of more. Don't mean to patronise ...
Per means divided by. The sum you are doing is multiplied by. You are
talking Watt Hours, not Watts per hour.

d

I meant 'per' in the context of 'for each' - wasn't that clear to you? I
hope you're not a maths or English teacher - would you really say 'six
per three equals two'?

Rob

"For each" is exactly the meaning of per, and that is why you have it
wrong. Suppose you buy 10 apples for 30 pence, that is three pence per
apple (for each). You do that sum by dividing 30 by ten. So Watts per
hour is Watts divided by hours. You need Watts MULTIPLIED by hours,
which is Watt Hours.

I'm not being pedantic - you are not just a little bit wrong, you have
it entirely upside down.

d


Well, I meant multiplied, but you've taken the word 'per' to mean
'divided' which I think you're always going to have difficulty
explaining to me - but thanks for trying. It's curious that you think
that I don't know the difference between multiply and divide - I do by
the way, picked that one up.


No, I didn't think you couldn't tell the difference between divide and
multiply. I thought you didn't understand the mathematical meaning of
the word "per". Such has proved to be the case.

The point, that I should have expressed consumption as kWh, and not
watts per hour, is taken. Am I allowed to use the term Wh' BTW?

Wh is just fine.

d

--
Pearce Consulting
http://www.pearce.uk.com