Dale's latest activity
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I'm sorry I annoyed you with my question. However, your quote from Wikipedia does not really answer my question about the different... -
Dale reacted to Ibix's post in the thread High School Traveling through space at zero km/s with
Like.
This is correct, and you will find it in physics textbooks too. This, however, is impossible. If you attempt to construct a frame of... -
Dale reacted to Greg Bernhardt's post in the thread Member and Mentor Appreciation Thread with Like.
It's sure been a wild ride this year! Between some AI missteps and breaking LaTeX for a good portion of the year (at least we got dark...
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Dale replied to the thread High School Does acceleration affect impact energy vs constant velocity?.I haven’t calculated it directly myself, but I think that you will need the following: Newton’s 2nd law $$\Sigma \vec F= m \vec a$$...
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Dale replied to the thread High School Does acceleration affect impact energy vs constant velocity?.Deformations may still be involved, just elastic deformations. That is the type of deformation given by Hookes law in my post above...
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Dale reacted to jedishrfu's post in the thread Undergrad My basic understanding of set theory with Like.
Your observation is encoded in Cantor’s notion of aleph numbers, which measure different sizes of infinity. The natural numbers have...
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Dale reacted to FactChecker's post in the thread Undergrad My basic understanding of set theory with Like.
That's a good observation. There are multiple ways of having infinities within infinities within ... Cantor developed that idea...
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Dale replied to the thread High School Does acceleration affect impact energy vs constant velocity?.The principle that you would use here is Newton’s 2nd law: $$\Sigma \vec F =m\vec a$$ where ##\Sigma \vec F## is the net force, and...
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Dale reacted to oz93666's post in the thread Undergrad Using the "triple point of water" to produce ice -- How does that work? with Like.
I think what they were doing was subjecting water to high vacum , this would first de gas the water and then cause it to boil , even...
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Dale reacted to jeffinbath's post in the thread Undergrad Using the "triple point of water" to produce ice -- How does that work? with Like.
The video stated that at the surface, water was de-aerated and ice was formed using the triple point of water principle. It even showed...
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In flat spacetime (Special Relativity) it's conventional to talk about "observers" or "inertial observers". This often means...
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Dale replied to the thread Undergrad Relational event horizons?.The thing is that the event horizon is a lightlike surface. That means that in any local inertial frame the event horizon moves outward...
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Yes, that is totally acceptable, Doctor. We mainly need to watch out for folks who try to use AI as a reference in the technical...
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I have another point to make: Modern physics is very much guided by the mathematics, often in direct opposition to the "intuition" of...
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Dale replied to the thread Undergrad Relational event horizons?.I am not completely sure about what intuition you want to address here. Is it this: In local inertial coordinates the speed of light is...