"Yousuf Khan" wrote in message
...
Androcles wrote:
Racing car drivers deliberately heat their tyres before and during a
race. How do they do that? By flexing them.
Its hard NOT to see how this "interactive tidal force has been
directly heating earth to its core" unless you are an idiot who knows
nothing about friction.
Seems to me the crust is damned good heat insulator or my tootsies
would be toasted from molten rock.
Temperatures in the mantle are cumulative affects, but those in the
ocean are not, are they?


Depends on what type of racing cars you're talking about, and what type of
tires. If you're talking about top-fuel drag racing with those incredibily
oversized balloon tires, then yes there is enough surface there that
flexing them heats them to a certain degree. Most of the heating still
comes from friction from the road surface though, when they do burn outs.

Other types of racing, such as Formula 1, hardly any flexure there.

You haven't seen F1 drivers have a warm-up lap before the race,
deliberately snaking side-to-side?
Here's a better example. Go outside and feel the tyres on an
ordinary car that has recently been driven for a mile or more.
They'll be warm. They are only flat at the bottom, though.