Recent content by TP9109

Hi, In this video: , it shows someone with an aluminium ring next to an MRI scanner. He allows the ring to fall over and it falls slowly demonstrating Lenz's law. I understand this but was wondering what would happen if a ferromagnetic ring was used instead of the non-ferromagnetic aluminium...

Thanks all for the replies, that makes sense now Thank you that makes more sense now, I never thought about ultrasound imaging using pulses

So i understand completely what the first source is saying i.e. the longer the relaxation time, the more absorption of the ultrasound beam. The first paragraph of the second source however says the opposite- "very long" relaxation times mean the sound wave passage is unaffected? My attempt at a...

Thanks for your reply, that makes more sense. So if we say that this animation represents that soft middle "c" note being played: https://www.acs.psu.edu/drussell/Demos/waves/Lwave-Red-2.gif I understand that the animation for the loud middle c would keep same frequency and wavelength but just...

Thanks for your reply, that makes more sense now

I'm coming back to physics after a long so apologies if this has a basic answer- How can the amplitude of a longitudinal sound wave be increased without increasing its wavelength? I understand what it would look like graphically if a low amplitude sine wave and high amplitude sine wave were...

I missed that part of the wiki page when I was googling answers, thanks for that it makes sense now

Apologies if this is a question with a basic answer, I'm coming back to physics after many years of being away from it! I read somewhere that for longitudinal sound waves traveling through air, if the temperature increases by 1 degree celsius then the velocity of the wave will increase y 0.6...