Nah, just another normal day in L.A…
Damn that looks nuts. I’ve been down there the last couple of days and I would not call it a riot at all, but can understand anyone who would after watching that.
Luckily we breed out girls tough down here…
Hey are you saying heat transfer between human body and salt water is different thatn human body and fresh water?
From what I understand the thermal conductivity of salt water is GREATER than fresh water meaning it should marginally suck more heat out of a human than fresh water.
But maybe there is a reaction when we are in salt water whereby our own bodies also generate more heat to overcompensate for the high salinity environment?
Not sure what you mean by heat transfer, but in the most simplest of terms, you are colder in fresh water and hotter in salt water. Just like if it was 95 degrees in the completely dry desert and 95 in 95% humidity. You would not race those races the same would you? Even though the numbers for temp are exactly the same…
And I had no comment on the wetsuit no or yes scenario, not sure why others have turned this into that argument I never made…
OK heat transfer is moving a unit of energy from one body to another. If you take one gram of matter, and heat it up by 1 degree celsius, basically you transferred ONE JOULE into that gram of matter.
So now let’s say you weigh 100 kilos (meaning 100x1000grams), if you suck 100,000 joules of heat out of your body to the water around your body temp would drop by 1C, so to maintain your body temp, you have to generate more heat as it transfers to water around you.
As heat conductivity of salt water is higher, your body has to turbo heat itself to just maintain its temp versus in fresh water where heat conductivity is lower.
So it just may be that to deal with the higher thermal conductivity of salt water our bodies react by turning on the internal heater. I don’t know how human bodies change internal regulators in salt vs fresh water, but from what I know salt water has greater thermal conductivity meaning heat transfer out of the human body is techically higher for the same temp body of water !!!
@The_GMAN_Retired , you roughly answered what I suspected, which is it is 99.9 percent certain to be a wetsuit race. Couple that with a 99.9999% flat bike, its going to be a shampoo ->blowdry->10,000m track event!!!
Per Brooks, the wetsuit limit is 68 degrees for the Olympians. It will be very close. That’s right about what the average water temp is in August.
Granted if the avg temp is 68.4 for the month, any cooler temps will make it lower (and vice versa if it’s suddenly warmer air, then it’ll stay non-wetsuit). The race will almost certainly be raced mid to later afternoon vs the traiditional AG race start times that most are familiar with (itu has for decades raced most afternoon local time slots). So it will at minimum likely have the most thermal heat/sun warming it up over an additional few hours vs a super early AM race.
Water temp is officially taken ~1 hour prior to the race start. Assume each race is race on it’s own day, but if they are raced back to back on same day, each race will have it’s own water check.
And yes I’ve seen itu have 4 races in ~6 hours and the wetsuit rule go like this:
1st race- wetsult allowedd
2nd race- no wetsuit
3rd race- wetsuit
4th race- no wetsuit
A front came through at the beginning of the 2nd race that cooled the water temps, but then by the time the last race started almost mid day it got hot again.
I also am not going to say that itu wants either way with a race, but there’s no “find cold water” type of shenanigans that AG RD’s suddenly allow it to be wetsuit legal. If they say it’s 67.8, or 68.4, you can with confidence know that’s the water temp.
Where I come from, burning multiple cars, smashing up police vehicles and attacking police on mass is definitely classed as rioting!
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I sense from your clear explanations of what a joule is and what 100kg is in grammes that this is not mainstream for you.
At 20oC:
- the thermal conductivity of fresh water is ~0.595 to 0.603 W/m.K (watts per metre-kelvin)
- The salinity of LA sea water is 36g dissolved salt / kg
- the thermal conductivity of this sea water is ~0.591 to 0.602 W/m.K (watts per metre-kelvin)
- So less
- That will allow you to consider the % difference in the “turbo heat”[ing] rpm.
Bottom line: the relevant wetsuit allowed threshold is 20oC fresh or sea water temperature (see the clip from the World Tri rules I shared upthread).
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Not dev’s 99.9% surety, I would say more like 60/40 that wetsuits will not be allowed for the pros. I worked that beach and surrounding area for 30 years, and it can often be 70 degrees that time of year, sometimes even 71/72… Normal temps are right around that 68 limit and of course there are the cold fronts that can tank it to low 60’s.
To me the cool part is that it will likely be a surf swim and that could be quite exciting if we get a nice summer swell. Whole new ball game if there is 3 to 5ft surf.