DaveC426913's latest activity
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DaveC426913 replied to the thread B Simple mass/scale puzzle.'We' being laypeople. This is where, having had it explained, laypeople begin to cease taking it for granted. Yes. -
DaveC426913 replied to the thread Collection of Lame Jokes.Pacino and ... (dammit, what's his name?) De Niro. I have a mental block with de Niro's name. I can never, ever, ever remember it. By...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.Yes. We take for granted that things hang, and that the ceiling exerts its own force. By the way, I did run this past a number of...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.Yes. This is a very difficult concept for the layperson to grasp in one go. I am not a layperson; I have been a very active PF member...
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DaveC426913 reacted to Herman Trivilino's post in the thread Is this an oversimplification? (treating a lens as a set of prisms) with
Like.
The larger the number of prisms, the better the approximation. But the surface of each prism is perpendicular to the normal at the... -
DaveC426913 reacted to Ibix's post in the thread Is this an oversimplification? (treating a lens as a set of prisms) with Like.
I think the message the book is trying to convey is that lenses work on the same principles of refraction that prisms do, and that the...
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DaveC426913 replied to the thread Is this an oversimplification? (treating a lens as a set of prisms).Again, it seems to achieve its goal quite well. I don't really understand what the objection is. Three prisms is sufficient to prove...
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DaveC426913 replied to the thread Is this an oversimplification? (treating a lens as a set of prisms).Does it not do that? It seems to do that quite well.
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DaveC426913 replied to the thread Is this an oversimplification? (treating a lens as a set of prisms).Sure. It's a simplification. Three is less than infinity. Is it an oversimplification? Only if it is too simple to teach the desired...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.Yeah. I could not have gotten here without you. I should clarify: I didn't mean to suggest I succeeded where yall failed - I'm saying...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.Yes. This is the culmination. I would not have been able to get here without the explanations y'all have been providing. :smile: The...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.Yes. I am trying to intuit the diagram from a handyman's (layperson's) point of view. They don't know from Newtons; forces are hard to...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.I'm starting to understand how to intuit the 10kg reading in the scale without resorting to altering the scenario. We only need to look...
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DaveC426913 replied to the thread B Simple mass/scale puzzle.That is an illuminating way of phrasing it... Even though it's been alluded to many times by many people in this thread, you've phrased...
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You talk about masses not forces. Thus you ignore the force that is always needed at the other side of the scale, even in the simple...
