Why is cold fusion considered bogus? - Physics Stack Exchange
Sep 22, 2011 · In the past, after Fleischmann and Pons announced their cold fusion results, in perfectly good faith, they were proven wrong by subsequent experiments. What are the experimental realities …
Why do whips hurt so much? - Physics Stack Exchange
Oct 16, 2018 · The reason, a Whip hurts so much is that the tip of whip moves extremely fast, causing the skin to tear. The reasoning behind this is easy to analyze from momentum conservation. Lets …
Why do I get negative entropy? - Physics Stack Exchange
Aug 29, 2025 · Yes, but I was trying to find the absolute entropy (like the one in the Boltzmann definition), not the Δ. So I thought to do this. Once we know that ΔS=Cln (T2/T1) we can split …
Is the E-cat by Andrea Rossi et al. for real?
Oct 11, 2014 · Rossi's device Unlike Pons/Fleischmann cells, or variants like Arata's or SPAWAR, Rossi is claiming fusion of ordinary hydrogen in Nickel. On the crazy-meter, Nickel-Hydrogen cold fusion is …
How do photons have temperature? - Physics Stack Exchange
May 19, 2024 · On the internet, I found "Temperature is a measure of the average kinetic energy of the particles in an object." (source) So, this temperature should be a result of friction. Light is …
waves - Why do airplanes sound louder when its cloudier? - Physics ...
Sep 4, 2024 · I am from India, and now its monsoon season. Typically, during this time, the sky is filled with dark rain clouds. Me, along with several of my friends, have observed from childhood that the …
Bohr's quantization of angular momentum - Physics Stack Exchange
Mar 24, 2021 · I find the discussion of the by Michael Fowler very interesting. The following is not meant as an answer, it is a description of Michael Fowler's approach. It appears Michael Fowler has made …
Why does water reflect light? - Physics Stack Exchange
Oct 4, 2015 · Why does water reflect light? What is actually happening when light is reflected by water? We know why metals reflect light; water, however, is not metal, but it still reflects light and we can see...
Why do we use Hilbert Space? - Physics Stack Exchange
Aug 19, 2025 · While studying quantum mechanics, I encountered the term Hilbert Space. As I understand, Hilbert space is an infinite-dimensional complete inner-product vector space. What …
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