Things you always wanted to know the answer to [Vol. 2]
Discussion
AstonZagato said:
I'm an average skier.
Looking at my SkiTracks app, the max speed I hit in my one week skiing this year was 78.6kph (48.8mph) and the average was 16.5kph (not sure how the average is worked out - does it include standing around, going up on lifts, etc.?). I hit 70kph+ most days.
I have done a season but was taking it relatively easy this year, skiing with the missus not mates winding each other up.Looking at my SkiTracks app, the max speed I hit in my one week skiing this year was 78.6kph (48.8mph) and the average was 16.5kph (not sure how the average is worked out - does it include standing around, going up on lifts, etc.?). I hit 70kph+ most days.
Ski tracks says 97.6km/h vmax on one day.
Lowest daily vmax for the week was 82.
Hitting 100km/h should be easy for someone prepared to tuck properly and straight-line it.
LordGrover said:
Carthage said:
Pears: how do they transform from turnip-like unripeness to rotten mush without ever seeming to transition through 'ripe' first?
Ditto nectarines.Another Youtube clicky For the whole 7 minute sketch (Obviously sweary, too)
AstonZagato said:
I'm an average skier.
Looking at my SkiTracks app, the max speed I hit in my one week skiing this year was 78.6kph (48.8mph) and the average was 16.5kph (not sure how the average is worked out - does it include standing around, going up on lifts, etc.?). I hit 70kph+ most days.
I'd be intrigued to know how a SkiTracks measures your distance, if by GPS then how does it account for downward travel?Looking at my SkiTracks app, the max speed I hit in my one week skiing this year was 78.6kph (48.8mph) and the average was 16.5kph (not sure how the average is worked out - does it include standing around, going up on lifts, etc.?). I hit 70kph+ most days.
scarble said:
AstonZagato said:
I'm an average skier.
Looking at my SkiTracks app, the max speed I hit in my one week skiing this year was 78.6kph (48.8mph) and the average was 16.5kph (not sure how the average is worked out - does it include standing around, going up on lifts, etc.?). I hit 70kph+ most days.
I'd be intrigued to know how a SkiTracks measures your distance, if by GPS then how does it account for downward travel?Looking at my SkiTracks app, the max speed I hit in my one week skiing this year was 78.6kph (48.8mph) and the average was 16.5kph (not sure how the average is worked out - does it include standing around, going up on lifts, etc.?). I hit 70kph+ most days.
Anyway, Strava manages to record pretty accurate speeds for a short section of trail called "10%" in the Alps, where you fall 10 meters for every meter you travel forward or so they say.
Hugo a Gogo said:
Edition87 said:
Why, when a car is reversing, it makes a higher pitched 'whirring' noise compared to driving forward? 
reverse gears are straight cut (because it's simpler/cheaper/smaller/easier) and straight cut gears make that noiseP-Jay said:
Anyway, Strava manages to record pretty accurate speeds for a short section of trail called "10%" in the Alps, where you fall 10 meters for every meter you travel forward or so they say.
For a 10% gradient you would drop 1 meter every ten.If you drop 10m in every 1m that would be a 1000% gradient and is essentially vertical!
walm said:
P-Jay said:
Anyway, Strava manages to record pretty accurate speeds for a short section of trail called "10%" in the Alps, where you fall 10 meters for every meter you travel forward or so they say.
For a 10% gradient you would drop 1 meter every ten.If you drop 10m in every 1m that would be a 1000% gradient and is essentially vertical!
http://www.youtube.com/watch?v=Y3UP8O-FYd8
2:25ish - looking at the vid - it's nothing like vertical - but it's steeper than it looks in the vid in the flesh.
P-Jay said:
I used to know the answer to this, I seem to recall it cross references the distance travelled and data from an 'OS' type map - but I might be making that up, I'm very tired you see.
Would depend on the accuracy of the height data then and how well it's aligned with GPS and how precise the GPS is, i.e. the potential error could be large I guess different sources of data can vary in accuracy too.
walm said:
GPS can determine altitude no problem with enough satellites but I think they cross check with a map too.
This is news to me! Satnavs will never cease to amaze me with (a) how complex the science, math and cartography behind them is and (b) how stupid the implementation can be 
I wonder, when they tell you how far you have to drive, does it account for gradients?
LordGrover said:
Carthage said:
Pears: how do they transform from turnip-like unripeness to rotten mush without ever seeming to transition through 'ripe' first?
Ditto nectarines.Shaolin said:
LordGrover said:
Carthage said:
Pears: how do they transform from turnip-like unripeness to rotten mush without ever seeming to transition through 'ripe' first?
Ditto nectarines.RIPEN RIPEN RIPEN!!
[/Izzard]
dave0010 said:
Why do horses need "shoes" also how are they fixed to there feet? Something that got brought up on a road trip and no one really had the answer.
Hooves evolved to work in grassland, not on metalled roads, so they need protection to avoid damaging their feet. The shoes are nailed on.scarble said:
This is news to me! Satnavs will never cease to amaze me with (a) how complex the science, math and cartography behind them is and (b) how stupid the implementation can be
I wonder, when they tell you how far you have to drive, does it account for gradients?
I was always disappointed with the then-new TomTom "3D" view, which is actually a perspective view of the route or map and not 3D at all, in that it doesn't show going uphill, downhill and so on. Or if it does, I can't see it.I wonder, when they tell you how far you have to drive, does it account for gradients?
Ayahuasca said:
What is the hardest, most complex thing a human can be trained to do? Say in terms of mental information processing / decisions (whether conscious or unconscious) made per second?
Landing a Space Shuttle? Playing a piano concerto? What?
I'd have thought flying a helicopter and brain surgery would rank pretty high on this list.Landing a Space Shuttle? Playing a piano concerto? What?
I doubt there's a single answer as 'complexity' really depends upon the individual.
marshalla said:
Hooves evolved to work in grassland, not on metalled roads, so they need protection to avoid damaging their feet. The shoes are nailed on.
IIRC used to put 'shoes' on ducks too for walking (droving?) them by road to market, thus "You can't shoe a goose" though I cannot remember precisely why not.StevieBee said:
Ayahuasca said:
What is the hardest, most complex thing a human can be trained to do? Say in terms of mental information processing / decisions (whether conscious or unconscious) made per second?
Landing a Space Shuttle? Playing a piano concerto? What?
I'd have thought flying a helicopter and brain surgery would rank pretty high on this list.Landing a Space Shuttle? Playing a piano concerto? What?
I doubt there's a single answer as 'complexity' really depends upon the individual.
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