The discussion centers on the relationship between sound waves and air pressure, specifically in the context of a demonstration involving fire and music. Sound waves consist of compressions, where air is denser, and rarefactions, where air is less dense. This phenomenon explains the varying sizes of flames observed when a standing sound wave is generated in a tube. Understanding these concepts is essential for grasping how sound interacts with physical elements like air. The explanation highlights the fundamental principles of sound wave behavior.
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Raza
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I can't hear him properly and if someone can explain it to me that would be great. I have taken grade 12 physics.
Sound waves are composed of compressions and rarefactions. Compressions are where the air is more dense and rarefactions are where the air is less dense. Hence the different sized flames when a standing sound wave is created in the tube.
Do we even know? My understanding of dark energy is that particles come into existence, exert and outward force, then vanish. My problem with that is how, of course, then how does dark energy know to push everything in the same direction? The pressure exerted would be in all directions, even if the space was moving so why isn't stuff pushed all over the sky?
Thanks - rev
I think it's easist first to watch a short vidio clip
I find these videos very relaxing to watch .. I got to thinking is this being done in the most efficient way?
The sand has to be suspended in the water to move it to the outlet ... The faster the water , the more turbulance and the sand stays suspended, so it seems to me the rule of thumb is the hose be aimed towards the outlet at all times .. Many times the workers hit the sand directly which will greatly reduce the water...