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Mars Dust
Bert posted:
David you said the sound waves on Mars would travel the same way "though the air" Earth's air atmosphere is a lot different than Mars. Completely irrelevant. You had asked, "I wonder how sound travels on Mars?". You *did NOT* ask about how "well" sound travels, nor did you ask at "what speed" the sound travels, but only "how sound travels on Mars". In doing this, you seem only to want to know *the mechanism*. Sound waves are compression waves. They can travel through solids, liquids and gasses. The speed and intensity vs. distance from the emitter are different with different gasses, but they travel in exactly the same manner by going through the atmosphere as the gas conducts the sound waves. The sounds on Mars would propagate very poorly due to the low density of the atmosphere, but they would propagate using the same mechanism that sound propagates on Earth, and would be detectable provided they were loud enough. Just the fact that Mars only has 1% as compared to earth's and that 1% is 93% CO2 would make a big difference to a tuning fork. The mass of the Martian atmosphere is *not* 1% of the Earth's atmosphere (it is 0.7 percent). The atmospheric pressure on Mars varies from around 4 millibars (4% of the Earth's mean pressure at sea level) to as high as 11 millibars (about 1.09% of the Earth's mean pressure at sea level) depending on where you are and what the barometric pressure is at any given time. The composition of the Martian atmosphere is over 95% Carbon Dioxide (not 93%). You are very close to being "grossly wrong" Not nearly as close as you are, as you are fairly consistent about being inaccurate or just plain wrong in your postings. -- David W. Knisely Prairie Astronomy Club: http://www.prairieastronomyclub.org Hyde Memorial Observatory: http://www.hydeobservatory.info/ ********************************************** * Attend the 10th Annual NEBRASKA STAR PARTY * * July 27-Aug. 1st, 2003, Merritt Reservoir * * http://www.NebraskaStarParty.org * ********************************************** |
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