送交者: pgss 于 2014-04-09, 12:01:42:

回答: It changes the density of water, of course, that changes the frequency. 由 steven 于 2014-04-08, 21:03:29:

• 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)

加跟贴