Recent content by AnssiH

Yeah, there seems to be many very intuitive ways to understand this. For me I just instantly started to think about two objects, like a rope moving inside a pipe, and thinking whether it would be possible to latch on to the rope, press a wheel against the pipe, and then gain leverage to move...

Yeah, pretty much. The kite example is pretty good. Of course for people who are not willing to examine their beliefs, no argument does anything. The most remarkable aspect to me is just how anti-scientific some people get when the feel the need to defend science. I guess a fairly general...

Lol, here we go again: https://www.scienceforums.com/topic/38816-brain-teaser-the-shell-game/?do=findComment&comment=396963 Just saying, if it's forbidden to post anything that goes over the head of a science forum moderator, then you should make damn sure you have moderators who at least...

Thank you, I'm feeling it coming back again.

So that thread is closed again, and this time the closing argument is that yes, propellers rotate and thus generate thrust, but only if the rotation is done by "an engine". The story doesn't say how air detects the means by which the propeller is rotating, to somehow circumvent the propeller...

Lol, yeah you are right! Sorry about that :) That's perfectly understandable, and truth be told I feel like even this analysis is overly complicated to point out the simple fact that laws of physics are not being broken by something being able to gain more speed than the speed of its...

The very definition of a watt is 1 nm/s. It's defined as "the rate of work when an objects velocity is held at constant 1 m/s against a force of 1 Newton". So I don't really see a dimensionality problem here as that's what I'm literally calculating, speed against a constant opposing force. Thus...

I feel privileged to have been allowed not one but two whole mistakes. 😌 But sorely disappointed that you decided to not explain what those mistakes were. How am I supposed to now learn anything? Shall we try scientific method instead?-Anssi

You guys are starting to restore my faith in humanity.

P_harvested_by_wheel = F * ground_velocity = 10 N * 10 m/s = 100 Nm/s = 100 Watts ... Thrust = 100W / 0.5dv Those are indeed the two I was referring to! 👍 So if it doesn't immediately jump out, I'll explain in detail. Please think this through; We want to know how much power we can get from...

Yeah, I wish more people would realize that. Do you mean you think no education is happening because there's never any math or logic in the presentation as to how this works? I would disagree with that, because in order to convince oneself that this does not violate the basic laws of physics...

Yeah I saw a number of threads about the topic here, and seems like for the most part people here are "getting it" pretty much straight (with occasional kicking and screaming ;) ) If you look at the thread at the other forum I think you can see that the problem is probably not the way I'm...

Yeah, Monty Hall Problem is indeed exactly what comes to mind from all of this, and I find it absolutely fascinating for the exactly same reasons. When I first heard of it, it gave me a brief pause but I didn't find it difficult to reason why it works like it does. I remember thinking simply...

I see there has been threads about Blackbird and "Down Wind Faster Than The Wind" operating principle in general, and I see a good number of people (most?) in those threads seemed to pick up some understanding of how it actually works. So that's a good start and gives me hope. I had never heard...

Yes of course; polarization is usually associated with wave behavior - it refers to the direction of the oscillation. A wave can be a pulse that is oscillating horizontally, vertically, in any diagonal angle, circularly and so on. So yes linear polarizers would eat away a direction component...