🚀 go-pugleaf

DonH <donlhumphries@bigpond.com> wrote:
> I've a little book on "Global Warming", first published in 2002, in which El 
> Nino features, but with no mention of La Nina.
>  Invented subsequently? 

While El Nino -- surface water warming in the Pacific -- has been 
studied since the 70s (I'm not sure exactly when the name was invented) and data
on surface cooling and its association with increased rainfall noted since 
1950, the name "La Nina" was only invented in the past 10 years or so.

-- 
[Specific learning problems #2:]
On 01/10/11 17:41, Phil Allison wrote:
> "Clifford Heath"
>   "Phil Allison"
>>>> Odds are it diminishes at high speeds since the tyres are subject to
>>>> large G
>>>> forces thereby reducing contact area and hence loss of energy by
>>>> deformation
>> I doubt that has much effect actually, especially with the very high tyre
>> pressures used on this kind of vehicle.
> ** Really ??
> 90 psi is only 6 atmospheres.
> 88 kph results in about 250Gs on the surface of the tyres.
[...some simple math... ]
So you're proposing that the rotational speed at 88KPH can save about
4 watts. Big deal.
  -- Clifford Heath <no@spam.please.net>, 11 Jan 2011 12:04 +1100