Just Chat! / Re: Bazalgette's magnum opus« on: Today at 18:07:44 »
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So the lowest frequency that might propagate as a reflected longitudinal wave is 15 times the fundamental of the highest-pitched open string - that's not "rich" but "squeaky", and the harmonics are mostly beyond human auditory range.It does on a guitar, because the ends are fixed. You might somehow induce a travelling or compression wave with a magnetic excitation of a steel string but the resulting frequency (MHz) will be far too high to contribute to the "wide rich sound...."I'd like to see the maths on that. Take the average guitar string as having a length of 1 metre and the speed of sound in steel to be 5km/sec
Planck's energy equation E = n.h.f,Where does the n come from? E = hf in my universe. But that doesn't mean energy is quantised. Planck's model describes the energy levels available to a particle constrained in a box. Obviously if you have two particles with the same frequency in the box, you have twice as much energy, but the box can be any size you like and a free particle can have any amount of energy you care to give it.
But a gentleman wouldn't draw attention to it, surely?nobody has ever insulted me with the title of philosopher!I had assumed you were a PhD.
Philosophy tries to decide which questions are meaningful; Physics just does some experiments.No. Philosophers assert which questions are meaningful, then question the meaning of meaningful until they disappear through their own anal sphincters. Physics is about discovering and predicting useful and interesting stuff.
What does the existence of energy mean, anyway?Physics is the business of constructing mathematical models of what happens (or doesn't happen - the branch of physics known as civil engineering). Within those models, energy is a conserved quantity in classical physics, and remains conserved as mass-energy in relativistic physics. Nothing more or less.
So the decay of the nucleus is only of significance when it is measured (to my mind) and this "measurement" is a synonym with "interaction"A whiff of anthropocentrism here! The decay of a nucleus is of huge consequence to the nucleus itself, which ceases to exist or spawns daughters, even if there is no observer.