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qczhao

Great read, thanks. It's admittedly been close to 30 years since I studied physics (at Imperial College fwiw) and haven't worked in the field since. My interest (and subsequent approach) is more philosophical these days, as you may have noticed, and I have found this discussion both educational and...

qczhao

Edit: just occurred to me now, rehashing the 'sail argument'. High pressure, low pressure etc, right? Okay, we all know the temperature rises (linear) as the pressure increases. But why, if not because of more molecules being packed into the same volume, thereby colliding with one another more freq...

qczhao

Edit: just occurred to me now, rehashing the 'sail argument'. High pressure, low pressure etc, right? Okay, we all know the temperature rises (linear) as the pressure increases. But why, if not because of more molecules being packed into the same volume, thereby colliding with one another more freq...

qczhao

Sure, level A physics assume zero friction and a vacuum. Only not to complicate matters, but the example you provided should be sufficient. If a ball bounces off a surface, we like to consider this collision without any 'loss' of energy. However, is it not the simplest truth to acknowledge without ...

qczhao

Hi Nakojo, Let me try to expand on my points in response to yours. Hope it clears things up. Sorry I read your initial post again and I don't see where you have addressed gravitational pull? At any rate, I believe your other explanations are wrong as well. I'm addressing your points in line below. I...

qczhao

Sorry I read your initial post again and I don't see where you have addressed gravitational pull? At any rate, I believe your other explanations are wrong as well. I'm addressing your points in line below. In a vacuum it's slightly different, but it's still all about friction. There can be no fricti...

qczhao

Ah, wings don't bend? Again, there is no accelaration without friction. None. Sorry but this is incorrect. Just taking the solar system as an example, since we can consider space to have zero friction since it's a vacuum: the planets orbit the sun, orbital motion requires objects to be constantly a...

qczhao

I think there's a couple different arguments at play here. 1. Watching motorsports makes you a better driver on the road. I would argue no. I think that motorsports fans may be in general better drivers than none motorsports fans (on the road), but only because we are interested in cars and driving ...

qczhao

Actually, friction is quite well understood... A hook and eye does not work by friction. Interference fits would not work. Stickle-bricks don't work by friction (although I would suggest friction has a small part to play in keeping the blocks together so they don't just slide apart in the direction...

qczhao

Because Torque and Power are related.

(Power = Torque x Engine RPM x unit conversion factor).

So once you get past 8000 RPM on that graph, the torque decreases faster than the RPM rises (to put it in simple terms) therefore the power decreases.

qczhao

I didn't intend this to go the 'rocket' way, but never mind. :] I've had a chance to read up some material. It's pretty intriguing and brought me to another question. Is friction the only source of adhesion? In an absolute friction-less scenario, there would ideally be no adhesion either. Or will t...

qczhao

Actually, friction is quite well understood... A hook and eye does not work by friction. Interference fits would not work. Stickle-bricks don't work by friction (although I would suggest friction has a small part to play in keeping the blocks together so they don't just slide apart in the direction ...

qczhao

I love how people are sitting around accusing him of being rude.

I'm sure that when you're piloting an F1 car around trying to win a race, the last you need to concentrate on is making your communications fluffy.

qczhao

if you look at sector times he was losing 0.4 tenths approx in S2 due to the downshift / KERS issue.

He did a fantastic job considering this.

qczhao

Hello.

I don't understand what you mean by aerospike.

You could indeed direct the exhaust forwards, but it wouldn't be of any benefit to the airflow.

qczhao

I would guess so! But really in the case of the human body I think it would make so little difference as the rest of us is so unaerodynamic that you wouldn't notice any change from having it to not

qczhao

Dimples DON'T create drag. If they did, golf balls would be smooth. They promote separation of the airflow and as I said, reduce parasitic drag. This is sometimes called "skin friction" drag. Basically, if the surface is very smooth, the airflow stays attached to it for too long and causes high dra...

qczhao

Of course Kamui CAN! He's just been denied all year by wrong strategy and bad luck.

qczhao

McLaren clearly haven't done that and it has been blunders from the pit crew as well as the pit wall that have haunted them. Maybe I've missed it but do we actually know if it was a pit crew blunder or equipment failure yet? I think it was equipment failure - the wheel gun wasn't torqueing up the n...

qczhao

No idea what happened to Kamui in the race, lost track of him for a bit! Made a change for Sauber to try a 3 stop with him though, if Vettel and co in front had pitted like they were expecting he would've been around 6 which ain't bad. But he still beat Perez, although Perez was very much thwarted ...

qczhao

But are they the same actual people, as a whole, as a living team? I suppose that part of them remained, but the BMW guys surely are out, and... Not to mention that it's also about morale and momentum. Ligier was also once a great team, used to winning, but when they started regaining some shine ba...

qczhao

Well, Sauber is not exactly a team accustomed to winning, maybe this is one reason. Like the high air up the mountains, maybe they get some calls mixed-up, it will probably take them some more races like this to get accustomed to that feeling of being a front-runner and smooth their strategies acco...

qczhao

I would so so so love it if Kobayashi won.

qczhao

Would love to see Sauber win before Peter steps down, but thats not going to happen tomorrow. Best hope is podium. That too is a long shot as no rain for tomorrow. With McLarens and Redbulls behind I doubt Kamui will be able to stay where he is. But I would love to see explosive start from him. But...

qczhao

Finally, Kobayashi is able to show his pace and the pace of the car.

Now, let's pray for him to drive a great race!

qczhao

In fact, it was Perez who ran into the back of Kobayashi (in Australia). In Malaysia what you see for Perez is just normal lateral flexing; it seems accentuated there because the braking zone is a bit bumpy. Kobayashi had a poor race in Malaysia due to gearbox (FP2), broken roll bar (FP3 + Qualy) wh...

qczhao

But, after his horrendous crash in Adelaide '95, where if Sid Watkins hadn't performed an emergency tracheotomy on him at the side of the track he would surely have died, to come back and win back to back WDC against Schumi... Well, even if he didn't have the natural talent of Senna or Prost or whoe...

qczhao

Being fast isn't enough. It's about getting those points at the end of the day. Which is what requires to become a WDC in a fast car, to get those points(plus wins, that's always good). It's funny when people thought Perez had the edge over Kobayashi in 2011, when this Japanese guy scored the major...

qczhao

make it a poll!

Also, Perez.

qczhao

A good race, not the best ever though.

Brazil 2008, now that was one of the best ever

qczhao

Anyone else getting a bit frustrated over the past few years at how proper wet races are just basically not allowed? Not the first time that they have red flagged the race only to then hold it up for about twice as long as was necessary. It makes no sense that we waited what must have been over an ...

qczhao

Congratulations for Perez for a great drive.

I am bitterly disappointed for Button and Kobayashi, my two favourite drivers who both had terrible race

.

qczhao

Disappointing qualifying today for Kobayashi :( 6 tenths slower than his team mate in Q2. Koba has been faster than Perez in all practise sessions though, so there's no reason to think a good race is not possible. A points finish is still on the cards. Fingers crossed! Some further info regarding K...

qczhao

Found him much more animated and enjoyable to watch in the pre-qualy show this week. So thumbs up!

qczhao

He did much better in sports car racing than F1. He won Le Mans 1990.

qczhao

Disappointing qualifying today for Kobayashi

6 tenths slower than his team mate in Q2. Koba has been faster than Perez in all practise sessions though, so there's no reason to think a good race is not possible. A points finish is still on the cards.

Fingers crossed!

qczhao

brownie123 wrote:return of the finger....

I don't seem to mind it at all when it's Jessica doing it :p

qczhao

I use a free alternative: yWriter.

Probably not as slick as a paid-for version but does everything I need it to do

http://www.spacejock.com/yWriter.html

qczhao

Are you saying he takes risks and then crashes out of the race? Because the only time I can remember where he DNF due to an accident that was of his making was Singapore 2010.

qczhao

Red Bull beat Monster though, that will complicate the scores somewhat. Nice avatar - Lambert did well on Saturday! 8) As for the Lucozade thing it isn't a one off deal, check out this article: http://www.mclaren.com/page/lucozade-to-help-drive-vodafone-mclaren-mercedes-performance You're telling m...

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