mcastillo356's latest activity
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mcastillo356 reacted to anuttarasammyak's post in the thread Doppler effect: why do I find this exercise so difficult? with
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Because by ##\lambda## you got $$ f_r=\frac{v}{\lambda} $$ 0.86 m is for ##u_s=0##, a parked car, which is larger than 0.76m which is... -
mcastillo356 posted the thread Doppler effect: why do I find this exercise so difficult? in Introductory Physics Homework Help.PICTURE ##(a)## The waves in front of the source are compressed, so we use the minus sign in ##\lambda=(v\pm{u_s})/f_s##. ##(b)## We...
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mcastillo356 replied to the thread Looking for movies where mathematics actually matters.¿Maybe Jurassic Park? The novel and the movie mentions fractals and chaos theory.
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mcastillo356 reacted to phyzguy's post in the thread Is A.I. more than the sum of its parts? with
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I think it's not true that current LLM's are deterministic. They all incorporate some level of stochasticity. -
mcastillo356 reacted to PeroK's post in the thread Is A.I. more than the sum of its parts? with Informative.
We may already be seeing that. Even computer systems much simpler than chatbots or neural networks can exhibit unpredictable behaviour...
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An initial draft? That was typed and not posted? Well, now it is gone!
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mcastillo356 reacted to Mark44's post in the thread Undergrad What is the most impactful way of introducing Laplace transforms? with Informative.
Laplace transforms are also useful in solving nonhomogeneous ODES such as those that describe LRC electrical circuits with an AC driving...
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mcastillo356 reacted to DaveE's post in the thread Undergrad What is the most impactful way of introducing Laplace transforms? with Informative.
It is THE main tool for linear systems analysis (often non-linear systems too). Analog circuit design, filter design, control systems...
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Welcome to PF! You've come to the right place. :smile:
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mcastillo356 replied to the thread A mechanical problem with complicated geometry.At first glance, ##m\vec{g}=\vec{F_n}## But I don't know how to solve it if I must consider geometry. ##V=\cfrac{1}{3}\pi\,r^2\,h##...
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mcastillo356 reacted to russ_watters's post in the thread How to get peers to review your work? with Informative.
I think you may have a misunderstanding of what "peer review" means, though it may partly be moot.... "Peer review" is what happens...
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Right. In your step 3, you ended up with 99, which is the same as 099. Reversing the digits of the latter 3-digit number results in 990...
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mcastillo356 replied to the thread Number trick.How does my arithmetic end up with ##1089##?. I don't understand. Maybe missing something of the statement?. Attempt The statement...
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mcastillo356 replied to the thread Number trick.If I have understood, your example ends up with ##999## Counterexample 1- ##495## 2- ##594## 3- ##594-495=99## 4- ##99## 5-...
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mcastillo356 reacted to berkeman's post in the thread Praise 2025 PF Member Awards Ceremony with Like.
Well you rumbled into PF like a bull in a china shop, what do you expect?! :smile: