送交者: conner 于 2014-04-08, 11:03:45:

• 不动哪来doppler？ (无内容) - pgss (0 bytes) 2014-04-08, 17:37:46 (745667)
  • The ship is moving. (无内容) - conner (0 bytes) 2014-04-08, 19:36:00 (745683)
    • that tells u the velocity of the ship???:) (无内容) - pgss (0 bytes) 2014-04-09, 12:09:29 (745737)
    • so? do additional information (无内容) - pgss (0 bytes) 2014-04-09, 03:21:51 (745706)
• it is voice, machanical wave, not radio. - steven (37 bytes) 2014-04-08, 14:11:35 (745632)
  • blackbox emits EM wave i thought - pgss (196 bytes) 2014-04-09, 12:08:24 (745736)
• 多普勒效应跟方位没关系 (无内容) - whoami (0 bytes) 2014-04-08, 12:24:59 (745622)
  • 和方位的变化有关系吧 (无内容) - conner (0 bytes) 2014-04-08, 12:34:06 (745623)
    • only the velocity of the object...IF it is moving (无内容) - pgss (0 bytes) 2014-04-09, 03:22:42 (745707)
    • In vacuum, or even atmosphere, not that many things can change - steven (220 bytes) 2014-04-08, 14:22:49 (745634)
      • sound or Em doesn't matter. the source is not moving what does doppler show? (无内容) - pgss (0 bytes) 2014-04-09, 12:00:12 (745733)
      • Are you sure the temperature can change the frequency ? - saas (181 bytes) 2014-04-08, 19:42:29 (745684)
        • It changes the density of water, of course, that changes the frequency. (无内容) - steven (0 bytes) 2014-04-08, 21:03:29 (745687)
          • termperature changes speed, freq remains unchanged - pgss (14 bytes) 2014-04-09, 12:01:42 (745734)
            • this is neither ideal gas, no homogenous either. - steven (237 bytes) 2014-04-09, 13:47:16 (745742)
              • doesnt matter, the key is, freq remains unchanged (无内容) - pgss (0 bytes) 2014-04-10, 19:55:02 (745835)
          • think again and avoid using of course (无内容) - 008 (0 bytes) 2014-04-08, 21:50:35 (745689)
            • Blah, blah, blah... (无内容) - steven (0 bytes) 2014-04-08, 23:18:45 (745694)
      • then how can you locate the blackbox even with constant signal? (无内容) - ASH (0 bytes) 2014-04-08, 14:57:46 (745639)
        • same as u in hide-n-seek, move around and compare change in intensity (无内容) - pgss (0 bytes) 2014-04-09, 12:02:51 (745735)
        • It is never easy. Typically, they see if they can triangulate. - steven (91 bytes) 2014-04-08, 15:10:49 (745642)

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