Recent content by Jay-qu

I think a rope satisfies the criteria of been a material... and I have previously had a big discussion about the speed of gravity - its finite, c more specifically which means it would take 8 mins till we fell out of orbit - the same time that it would take for us to notice that the sun isn't...

ok so I guess no Aussies... whats it like in everyone elses countries?

The disspersive nature of low frequency sounds is due to diffraction. The same thing happens for light. As for it passing through solids easier I don't know if its correct to say resonance makes it pass through easier but that if the sound is at the objects natural frequency than it will...

Astro-Physics I live in Australia and want to get into astro-physics. I have just finished my final year of school and I am looking at degrees in Science majoring in Astronomy and Astro-Physics, Aerospace Engineering or there is a double degree that does both! So are does anyone know what...

E = mc^2 is always a good start:wink: that relates light to mass (sort of)

the electron is moving - the probability wave is a standing or stationary wave, hence the electron moves but the wave doesnt. The circumference of the orbit must be a multiple of the de Broglie wavelength of the electron in order to set up a standing wave. This is also why electrons exsist in...

A ban wouldn't work for me... (though I am not yet addicted to PF just scienceforums.com) because I would just make a new account!:-p

well firstly I assume that by 4D you mean '4 spatial dimensions' otherwise it is debatable whether or not to include time as a dimension, and then you say constraints, which could be interpereted as laws of physics - ie can't exceed c, things like that. Final answer: I don't know, and anyone...

the forces propagate though the material at <c, I have heard some claim that it is at the speed of sound (in that material) but I don't know and I am not willing to do an experiment