[A-List] Fw: Oil Addiction: The World in Peril - 4

["tony black" <tal@xxxxxxxxxxxxx>]

...Not to cavil excessively, but a friend of mine forwarded me this small
proviso to the author's calculations.

T.

----- Original Message -----
From: "Kent Nickerson" <knickerson@xxxxxxxxxx>
To: "tony black" <tal@xxxxxxxxxxxxx>
Sent: Tuesday, August 02, 2005 12:42 AM
Subject: Re: Oil Addiction: The World in Peril - 4


> 2 kW-hours to lift a house 23 feet implies that the house weighs about
> 10 metric tons.  One manpower, however, is defined as 150 Watts (a
> horsepower is 750 Watts), so 2 kW-h is about 13 man-hours of labour.
> Factoring in 33% efficiency, this is about 40 man-hours or 5 man-days at
> the power plant.  I believe the bit about 23 feet but I think our friend
> is off a factor of 100 on the man-days.  Still, a large amount of work
> for washing clothes.  His point stands but he needs to check his math.
>
> On this tangent, a single AA alkaline cell, if perfectly converted, has
> enough energy to lift an average man (75kg) about 30 feet in the air.
> Incredible.
>
> Kent
>