Recent content by brettjor
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Graduate What is the context of observation in this video?
The philosophy is fascinating. The QM physics theory, solves several problems. It works for what we need it to do. We can launch a rocket to the moon with Newtons brilliance. We could launch a spaceship to the moon with Einsteins brilliance. But why would you want to? Use the simplest...- brettjor
- Post #60
- Forum: Quantum Physics
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Graduate What is the context of observation in this video?
Right, but without capturing those photons you don't know what happened. All you have is a particle/wave.- brettjor
- Post #54
- Forum: Quantum Physics
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Find the angle the boat has to head
I'd think of it as a triangle. You have the speed across (8.2 m/s), the base 477 m and the speed along the short side 4.5 m/s. That's the geometry answer, but it's simple. Of course, in the real world you just keep adjusting the boat to get to the point you want to go. You start off...- brettjor
- Post #2
- Forum: Introductory Physics Homework Help
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High School What are pingos and how do they form?
I also have never figured out why people feel they need to disseminate in an anonymous environment either. Me, I'm a science hack. Love it, but spent my youth being afraid of math. Trying to fix that now. Anyway, I'm out. Seriously though Sam, go look up pingos.- brettjor
- Post #9
- Forum: Thermodynamics
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High School What are pingos and how do they form?
Unless there is permafrost, at which point it becomes a closed hydrostatic system. It's not what he's getting at, but it's a valid point.- brettjor
- Post #7
- Forum: Thermodynamics
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Can 1,000 Boats Really Push the Chao Praya River Out to Sea Faster?
Yup, I screwed that up. Of course the boats were already there. Of course they will accelerate the water. I let my incredulity get in the way. And of course, my incredulity got in the way of the obvious fact that this will make no difference. Oops, there it is again. ( I was thinking about... -
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High School What are pingos and how do they form?
I don't think there is enough information to answer your question. Where does the question come from? That might help make it answerable.- brettjor
- Post #4
- Forum: Thermodynamics
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Can 1,000 Boats Really Push the Chao Praya River Out to Sea Faster?
I'm thinking the anchored boats will also slow the flow of the river. 40 small hulls?Subtract that from the process. What is the efficiency of a boat motor? I'm sure they all have differences. Friction from the hull, turbulent flow displacement of the water with the additional friction... -
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Undergrad How can a non-flowing fluid have kinetic energy?
Put the liquid in a sealed container wait for it to stop moving from your lifting it and drop it from a height. -
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High School What are pingos and how do they form?
Ack, I lost my post (I think.) Several questions: q1: the ice temp at the top or the air temp at the top? q2: what is the temp gradient of the ice? q3: Fresh water or salt water? q4: Is there permafrost under the lake? If there is then the water is under pressure and it throws off the...- brettjor
- Post #2
- Forum: Thermodynamics
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Waiting for a Job Offer - Should I Accept Less Due to Age?
Interesting, this isn't a physics question. Personal opinion, follow your bliss. Damn the money. Professional opinion, make them a counter offer 15% more than they offered. Settle for 10% less than they offered, unless you simply love the work and the location. In that case damn the money!- brettjor
- Post #11
- Forum: STEM Career Guidance
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Time: A Scientific Exploration
It's not a dimension per say. It's an unconstant constant constant.- brettjor
- Post #94
- Forum: Special and General Relativity
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Time: A Scientific Exploration
It's the thing that keeps everything from happening all at once.- brettjor
- Post #93
- Forum: Special and General Relativity
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Opinions on a Hypersonic Tunnel based Transportation System
A vacuum pulled train is an interesting idea. Set the center of gravity so that the train could freely orient "down" with one G turns. Fun! Perfect for the next Sci-Fi movie. Then again, it would probably be cheaper to rebuild the old steam locomotives and run them on the surface. (That's...- brettjor
- Post #8
- Forum: Aerospace Engineering
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Values of Velocity at which the body will move without bouncing
In a perfect world, no bouncing, just diminished G's. In the real world, imperfections in the hoop and "road" surface could easily create bouncing. Isn't this why we balance rotational bodies?- brettjor
- Post #3
- Forum: Introductory Physics Homework Help