Over 30 degrees of difference in air temp. I don't know water temp at the lake, but the past couple of weeks the water has become a lot warmer and I suspect that it not sucking heat out of the air is part of the problem.foilholio wrote:I don't really notice a difference, if anything it is worse in the cold because of wetsuit etc. I get my best low ends in warm weather.
Also? There is very few windmeters which do not measure the force of the wind. This force usually rotates the rotor of the meter or moves directly some pressure indicator. This means also less turbulent wind gives higher speed values like denser air does too. In practice this is not a bad thing.foilholio wrote: There is also wind meters that merely measure the force of the wind and relate that with a speed,
Agree. Once it had wind 4 knots sideshore and i was doing 3 meter jumps. Air temp 34C and water temp 20C !!! from an overnight "upwelling". The afternoon before the water was 30C. !!!foilholio wrote:I get my best low ends in warm weather.
Japanese mushroom magical?PullStrings wrote:To quote Kamikuza...it was magical
Wrong equation. http://large.stanford.edu/courses/2010/ph240/sleiter2/plummet wrote:What is the actual increase/decrease in kinetic energy from changing temperatures?
First up we have to use the ideal gas law to calculate the mass of the air
http://www.engineeringtoolbox.com/humid ... d_677.html
Lets use a 0 and 30 Degrees C for calculations.
0 deg c = 1.29kg/m2
30 Deg c= 1.17kg/m2
Then we throw that into the kinetic energy formula
https://en.wikipedia.org/wiki/Kinetic_energy
1/2 mass x velocity squared.
Lets use 4 knots for wind speed.
The increase in kinetic energy dropping from to 30 degrees to 0 Degrees = 11%.
That doesn't sound like much. But it could be significant in ultralight winds.
What is the increase in kinetic energy going from 4 to 5 knots or wind speed all other aspects being equal?
55% increase.
Wind speed increase is far more significant that temperature variations.
Nothing is that magicalfoilholio wrote:Japanese mushroom magical?PullStrings wrote:To quote Kamikuza...it was magical
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