| Friends of Talk Rational!: |
| Nontheist Nexus | Rants'n'Raves | Secular Cafe | Council of Ex-Muslims | Rational Skepticism | Daily Wingnut | |
|
|||||||
| Science/Skepticism Dangerous meddling in things man was not meant to know. |
![]() |
|
|
Thread Tools | Display Modes |
|
|
#599257 / #1501 | ||
|
Senior Member
Join Date: May 2009
Posts: 4,457
![]() |
Yes. Seriously.
Quote:
Quote:
Last edited by spork; 09-01-2009 at 02:27 PM. |
||
|
|
|
|
#599270 / #1503 | |
|
Senior Member
Join Date: Aug 2009
Posts: 10,394
![]() |
Quote:
If instead of the belt, you use a small roller or electric drill to spin the wheel to the same speed while holding it -over the belt or not - then that is exactly like the held condition of the belt. It must be. The thrust from the propeller must be the same, because the propeller has no idea what is driving the wheel. So the belt and the roller are identical. There is no "windspeed". |
|
|
|
|
|
#599278 / #1504 |
|
Senior Member
Join Date: May 2009
Posts: 4,457
![]() |
But when you take our bet we won't use a treadmill or a small model. We'll be riding a cart that has a prop with a 15' diameter. There will be no hand holding it in place. I'll bet your facility could use a new large screen plasma TV for the commons room. You'd still have enough left over to make a whole lot of tinfoil hats.
|
|
|
|
|
#599320 / #1505 | |
|
♫♪ hold still ♪♫
Join Date: May 2009
Location: Mostly Harmless
Posts: 3,845
![]() |
Quote:
Spork, If you ever get some fool to take the bet, I want in on the action. I will add another 10 grand to the pot. Fuck, I will give 10 to 1 odds as well.
__________________
- -- I don't get mad. I get even. --- and living well, it really is the best revenge |
|
|
|
|
|
#599326 / #1506 | ||||
|
God Made Me A Skeptic
TR Treasurer
|
Quote:
Quote:
Put the numbers on it. I can't; my understanding of physics ends around "electricity lives in metal and water and bites". But I'm pretty good at checking numbers. Quote:
Quote:
Slow down, show your work. Start from the top. Include all the numbers. |
||||
|
|
|
|
#599331 / #1507 | |||||
|
Senior Member
Join Date: Aug 2009
Posts: 10,394
![]() |
Quote:
Quote:
Quote:
How can something traveling at windspeed be tied to the ground? It is no-man's land, and that they made a video of that mistake for all to see. Quote:
Quote:
In fact, it slips all the time. A wheel on ice can move by translation - pure linear motion with no rolling. It can also do the same, but with the wheel spinning either way. The linear momentum carries the translation, and the angular momentum the rotation, but that is not coupled to the ground so slips, and is therefore not actually rolling. The cart is like that - it is not really rolling on the surface in but spinning like the wheel on ice. |
|||||
|
|
|
|
#599354 / #1510 | ||||||||
|
L33t h4xx0rz
Join Date: Jan 2009
Location: Monterey
Posts: 5,802
![]() |
Quote:
You're lying again, humber. Quote:
Whadda ya mean, "No?" Are you taking LSD, or having delusions, or trying to lie again? All I did was repeat what you said back to you, asshole! What the flying fuck do you mean, "No?" Anybody can go look at it, the link is right there. There's nowhere to run, nowhere to hide. You're still lying, humber. It's not, humber. Anybody can look at the video and see it's not. There's no point in "if." It's not, and that's all there is to it. Quote:
Do you even know which, humber? Are you so far gone you don't even know when you're lying any more? It sure looks that way. Quote:
Spork says that, humber. You're agreeing with spork. Spork says the cart takes energy from the belt in order to stay still, humber. Was there something that you were arguing about? Do you remember what it was? Quote:
Have you ever flown in a hot-air balloon, humber? I have. When you're up there, there's no wind. You know why that is, humber? Because the balloon's moving the same speed as the air. Same deal with the cart. It's not moving with respect to the air, humber. It's not moving with respect to the air when it's on the treadmill, and it's not moving with respect to the air when it's rolling down the road. That's how it works. It's simple. Not complicated like you're making it. That's what happens when you make shit up; everyone can look at it and see you're lying. Quote:
You're lying again, humber. You lie so much you can't keep your stories straight. You can't remember what you said, who you said it to, or where you said it. That wouldn't be a problem, though, if you were telling the truth, would it, humber? Quote:
And humber, everybody's watching. You're standing up on stage with no clothes on, and everybody's staring at you. You're not cute enough to be standing up there with no clothes on, humber. Nobody wants to see your pale, slug-like torso, or your little teeny penis all shriveled up and trying to find a place to hide. But there you are. Lying. In front of everyone. Naked. Disgusting. ETA: OK, so I took the size tag out. Inch-high red letters were likely to remind this guy of the letters of fire on the inside of his forehead.
__________________
Q: What's the difference between a good lawyer and a bad one? A: The good one isn't breathing. Q: What do you call 10,000 lawyers at the bottom of the sea? A: A good start. Last edited by Schneibster; 09-01-2009 at 04:31 PM. |
||||||||
|
|
|
|
#599372 / #1511 | ||
|
Senior Member
Join Date: May 2009
Posts: 4,457
![]() |
Quote:
Quote:
![]() |
||
|
|
|
|
#599387 / #1512 | |
|
Senior Member
Join Date: Aug 2009
Posts: 10,394
![]() |
Quote:
If you take a small four-wheeled toy car, and place it on the supermarket checkout belt, it will move back with the belt. Of course, if you restrain the rear of the car with your finger, then it will be held in place as the belt moves under the now stationary car. It won't take much force to restrain it, just your little finger. By using exactly the same "reasoning" as Spork, we can now say the car is at "windspeed" ( for that belt speed), propeller or not. Do you believe that car is at windspeed, Seebs? |
|
|
|
|
|
#599393 / #1513 | |||||||||
|
Senior Member
Join Date: Mar 2008
Location: Florida
Posts: 4,639
![]() |
Quote:
So the force of this friction is in which direction? Why "backwards" w.r.t. the treadmill (or "to the left", or "upwind" or...). So for the cart to attain equivelent velocity with the treadmill it's work (the propeller) would have to have the same counter-acting thrust as this friction. But we know that the propeller is providing MORE thrust than this don't we. Quote:
So let's look at a cart-centered reference frame and see that the cart is motionless, the ground is moving to the left and there is a small wind component moving to the right. Would you agree with that? (remember, we don't have the propeller connected at all, just the cart with wheels and rolling friction) Quote:
The strings, and the direction in which they are pulled, are only directional indicators of force. They are not scaler unless we measure other factors (like force applied to the string). So if in the video the string is pulled backward (with the treadmill motion) then we can say the cart is travelling slower than the wind. If the string is pulled forward then we can say the cart is travelling faster than the wind. In reality there will never be a time when the string is slack in equilibrium since force balance in real life is a real bitch. But you can clearly see this in transition in the video when the cart goes from a backwards to forwards pull on the string. If the treadmill was a mile long then no string would be needed and we could observe the cart move either to the right or left for a long time before it left the track. The string is only there because spork wasn't smart enough to do this test on a mining conveyor belt. ![]() Quote:
Quote:
And we know the force of the propeller thrust is greater than the rolling friction of the belt. So with this in mind which way must the cart move w.r.t. the belts motion? Quote:
I must state that the wheel is directly coupled to the treadmill belt. If you measured the wheel radius and calculated the length travelled in one wheel rotation then that is exactly the amount of belt that travelled past during that rotation. Unless you want to prove otherwise? |
|||||||||
|
|
|
|
#599401 / #1514 |
|
Senior Member
Join Date: May 2009
Location: Puget Sound
Posts: 3,434
![]() |
Would Harold get it if we put the cart on the back of a truck, I don;t think so.
But let's try just for fun. Okay Harold, you know that the cart can advance up the belt inside when there is no wind so lets put the treadmill on an enclosed truck and drive it around a bit. If the speed of the truck is steady the motion of the truck will not affect the cart, so it should still move up the treadmill. Right? Okay now imagine a day with a nice 10 mph wind. We take the truck out with the cart inside on the treadmill and drive in the direction of the wind, at the speed of the wind. Got the picture? Good. Hey! The cart still moves up the treadmill. Okay now we drop the sides of the truck and since we are going exactly with the wind the wind the cart still moves up the treadmill. Now we look down at both the treadmill belt surface and the ground and we notice that they are both traveling in the same direction at the same speed. So we take our cart that was moving up the treadmill towards the front of the truck and put it on the ground. Now as far as the cart can tell the conditions are exactly the same as they were before when it was advancing up the treadmill so it continues to act in the same manner, passing our truck and moving faster than the wind. I know that humber will bring some more of his Lindy Hop nonsense to try to explain why this wouldn't happen but there you go. |
|
|
|
|
#599411 / #1515 | |
|
Senior Member
Join Date: Aug 2009
Posts: 10,394
![]() |
Quote:
Do you think the escrow holder, is going to release the money on the word of one party, or will they need both? The answer is both. That's a problem. If after the test, one side may not like the result, and refuse to release the money. That's a potentially long and tedious legal hassle. To solve that, you need a third party to adjudicate, and the money released on that authority. That's going to be difficult to arrange. But there's another problem, because the adjudicator is responsible for the issuing of the money, so he will need to be sure that the result is fair. He will need scrutineers to prevent cheating, and some technical authorities to judge the validity of the result. Any skeptic knows that you have not done your technical homework, and rely solely on streamers and your opinion to measure windspeed. If you agree to other instrumentation, you are going to be in for a surprise, but you are not prepared to lose. That, and the attitude displayed to those who disagree with you, strongly suggest that you are just the type to be sore loser, and that will mean judges and so forth. Too much trouble, more than it's worth. It's not the money, it's you. |
|
|
|
|
|
#599423 / #1517 | |
|
arguing with idiots
Join Date: May 2009
Posts: 2,294
![]() |
Quote:
|
|
|
|
|
|
#599432 / #1518 |
|
Senior Member
Join Date: May 2009
Location: Puget Sound
Posts: 3,434
![]() |
Harold, if the truck is moving at 10 mph and the treadmill is set for 10 mph the speed of the treadmill top relative to the road is 0 mph. Even you should be able to figure out that math. The bottom side of the treadmill, the part we don't see, is going at 20 mph relative to the road. So try again.
In the meantime answer this question: What is the speed of a tire at the point of where it touches the road on a ten mph truck? |
|
|
|
|
#599438 / #1519 | |
|
arguing with idiots
Join Date: May 2009
Posts: 2,294
![]() |
Quote:
|
|
|
|
|
|
#599439 / #1520 | |
|
hoppy
Join Date: May 2009
Location: cooler
Posts: 2,226
![]() |
I'm going to keep posting this until you explain to all of us why the cart knows to act differently in a real wind than it does on the treadmill.
Quote:
I'm going to show you that again, Harold, just to rub some more salt in to that self-inflicted wound of yours (the one on the end of your neck, that is): (1) dwfttw cart ... (c) cart rest frame ground v = -14 wind v = -4 (apparent headwind) cart v = 0 (2) spork's treadmill cart ... (c) cart rest frame tread v = -14 wind v = -4 (apparent headwind) cart v = 0 |
|
|
|
|
|
#599449 / #1521 | ||
|
Senior Member
Join Date: May 2009
Posts: 4,457
![]() |
Quote:
Quote:
Still no one can explain how they can be absolutely certain, but not willing to take a bet, even with 10:1 odds in their favor. Last edited by spork; 09-01-2009 at 05:32 PM. |
||
|
|
|
|
#599452 / #1522 | ||
|
Senior Member
Join Date: May 2009
Location: Puget Sound
Posts: 3,434
![]() |
Quote:
|
||
|
|
|
|
#599479 / #1523 | |
|
Senior Member
Join Date: May 2009
Posts: 2,950
![]() |
Quote:
The *correct* answer is that the escrow holder will release the money according to (and only according to) the escrow instructions which were agreed upon BEFORE the money was put into escrow. The won't be releasing the funds on the word of EITHER party, nor will need the 'after the fact' agreement of EITHER party to do so. One example of the way the escrow agreement could be written is that there is a panel of judges (perhaps each side picks two of their liking and agree on a fifth) and the vote of the judges determines the release instructions. Alternately it could be base on certain instrument outputs with an agreed upon knowledgeable judge installing and monitoring the instruments. Give it up Humber ... even when it comes to the simplest aspects of the escrow process you are clueless. The escrow agents primary job is to execute instructions that were decided on BEFORE the money is in escrow, not to attempt to get agreement after the fact. JB |
|
|
|
|
|
#599557 / #1525 | ||
|
L33t h4xx0rz
Join Date: Jan 2009
Location: Monterey
Posts: 5,802
![]() |
Quote:
Quote:
"Me and my master." Paranoid much?
__________________
Q: What's the difference between a good lawyer and a bad one? A: The good one isn't breathing. Q: What do you call 10,000 lawyers at the bottom of the sea? A: A good start. |
||
|
|
![]() |
|
| Thread Tools | |
| Display Modes | |
|
|