-
Posts
54740 -
Joined
-
Last visited
-
Days Won
322
Content Type
Profiles
Forums
Events
Everything posted by swansont
-
Does this math explain lights speed ?
swansont replied to Pbob's topic in Modern and Theoretical Physics
Sorry, but joigus is right. You are vastly overestimating your understanding of physics -
Does this math explain lights speed ?
swansont replied to Pbob's topic in Modern and Theoretical Physics
No, you cannot. Making stuff up is kinda the opposite of science. Sure we do. The speed of an electromagnetic wave from Maxwell’s equations is c -
Spin off concerning reliability and safety of electric vehicles.
swansont replied to studiot's topic in Engineering
I doubt such a citation exists; it’s like proving a negative. Emergency backups working as planned isn’t newsworthy. But we hear about such failures when they occur. When hurricane Sandy hit the US east coast some years back, gasoline and diesel supplies were impacted, because the refineries and terminals were without power. So generators couldn’t be replenished once the fuel ran out. No gas/diesel for trucks to move fuel to critical customers. This was news, because it was a failure of unanticipated duration. I imagine this caused a re-think of emergency procedures, as would the scenario you describe. I know we have at least one thread where that idea is shown to fall well short of being self-sustaining (and I notice the article provides no analysis). A few added km of range, yes, but nothing more. -
Reactionless Drive that conforms to Newton's 3rd laws.
swansont replied to Aquatek's topic in Speculations
The KE doesn’t matter; at 45 degrees the momentum is smaller. KE doesn’t directly correlate with the force -
Reactionless Drive that conforms to Newton's 3rd laws.
swansont replied to Aquatek's topic in Speculations
I don’t see where you stated that. This will change the mass distribution; the box would move but the center of mass would not. How do you reduce the KE before it hits the rear of the box Does it continue forward after the stream is turned off? -
! Moderator Note Discuss freewill as you wish, but you need to do it without proselytizing.
-
Reactionless Drive that conforms to Newton's 3rd laws.
swansont replied to Aquatek's topic in Speculations
Providing more evidence than just your say-so would be job 1. If it’s reactionless, then it violates conservation of momentum. You are misusing the terminology. And have not described the device. -
Claiming this means you reject relativity, because there are no absolute frames in relativity, and relativity allows you to compare the observation of different frames. You would need to provide evidence of this absolute frame. Which has nothing to do with being “in reference to the universe” It’s just your motion relative to the source Repeating this doesn’t make it true. Why can’t you provide experimental evidence to support you claims? What does this mean?
-
Right. So you should be able to set up equations for the forces on each block.
-
What does the third law tell you about these normal forces?
-
Does Gauss's Law explain a Higgs field and universal inflation ?
swansont replied to Pbob's topic in Speculations
Gauss’s law works because the potential for a point charge is 1/r (all other configurations are superpositions of that). I suspect that’s not the case for the Higgs. -
! Moderator Note The topic was how to pray. It was not an invitation to bash beliefs
-
I see you have mg and N; I’m not sure why you would include a fictitious force. mg acts down (-y), and N has a y component and an x component. What can you say about the normal force that m exerts on M, and that M exerts on m?
-
! Moderator Note Moved, because this doesn’t seem to be a puzzle, as such.
-
That’s a fallacious extrapolation. No group of scientists are monolithic in their views. And if you want to support an idea, it needs to be based on science, not bashing others.
-
I agree that teaching can motivate you to learn and can point out your knowledge deficiencies, it doesn’t inherently increase your knowledge. And you have to honestly assess whether you understand something - when a question is posed to you, can you answer it or are you BS-ing your way through it? We’ve seen a lot of examples here of people (at least one claimed to have been a teacher) who were very confused about some basic concepts while insisting they understood.
-
LOL I’m hoping that discussing science starts soon.
-
Why does an electric car needs so many more chips than an IC car?
swansont replied to TheVat's topic in Engineering
So every collision results in such a fire? So about 7 incidents per year. Some mention shipments of batteries (one mentions a shipment of 81,000 batteries), so this could be out of untold millions of batteries shipped. IOW the odds of an individual battery failure appear to be quite small. We have no data on whether these were due to manufacturing defects or improper handling, both of which can potentially be addressed. -
Why does an electric car needs so many more chips than an IC car?
swansont replied to TheVat's topic in Engineering
Fixing everything would be an unreasonable expectation. Sadly, the tactic of deriding something for not being perfect is used as an excuse to not do anything to improve the situation, when you don't want to do anything (see COVID, gun control) The US is stuck with automobiles as the primary mode of transit, including medium-haul (a few hundred miles), so the push to move away from fossil fuels has to be thought of with that constraint in mind. -- As far as the 1.6 kg of fossil fuels per chip goes, that article is from 2002, and probably refers to a specific type of chip. Newer chips are not just silicon, and fabrication has produced smaller chips over time. They mention a 32 MB chip (!) while memory today is perhaps as much as 100-1000x larger. One metric one can use to assess this is that a chip can't use more fossil fuel than the cost of the chip (and probably only a small fraction of it) - these people turn a profit. So one might ask how much these chips cost, because that would put a limit on how much fossil fuel goes into making them. $2000* per car? Then maybe it's using $200 worth of fuel. Depending on how much you drive, that might be a month or two of gasoline in the US. And one of the functions of the chips is improving your fuel economy. These probably "pay for themselves" many times over, in terms of fossil fuel impact. *scale as appropriate -
It's the physics ideal case. Completely static, no changes to anything. I would expect some sort of asymmetry if you got to a small enough resolution, for any real system.
-
We don't know what the inside of a BH actually looks like. The simplest solution predicts a singularity, and that's unphysical. Geometrically speaking, yes, it has a center. The simplest case should also have spherical symmetry.
-
Why does an electric car needs so many more chips than an IC car?
swansont replied to TheVat's topic in Engineering
I think the issue is where the chips are specifically in an EV, not which chips are going to be common to both an EV and ICE vehicle. Lights, door locks, etc. are common to all vehicles. To me the batteries, the power distribution and regenerative brakes are the obvious candidates when looking at differences between the two types of cars. -
Why does an electric car needs so many more chips than an IC car?
swansont replied to TheVat's topic in Engineering
There are people that do, and more will do so as infrastructure is put into place. To view this another way, nobody will if the infrastructure isn't there, and then you will limit adoption of EVs. Only if you view minimizing gas consumption and safety as conveniences. That would be one way of forcing the US to expand rail and mass transit, I suppose, but our system is built on being able to drive from point A to point B, and much of that at speeds faster than 30 mph. And we have lots of vehicles that get much better than 25 mpg. Same here; especially living where it snowed in the winter - cars would rust because they had steel everywhere, and it got attacked by the salt. -
Why does an electric car needs so many more chips than an IC car?
swansont replied to TheVat's topic in Engineering
And got what, 10 miles per gallon? Plus a top speed of 30 miles/hour and, as a bonus, were not very safe!