About: Birch's law

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Birch's law, discovered by the geophysicist Francis Birch, establishes a linear relation between compressional wave velocity vp and density of rocks and minerals: where is the mean atomic mass in formula units and is an empirical function determined by experiment.

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  • Birch's law, discovered by the geophysicist Francis Birch, establishes a linear relation between compressional wave velocity vp and density of rocks and minerals: where is the mean atomic mass in formula units and is an empirical function determined by experiment. (en)
  • 贝切定律（英文；Birch's law)，是美国地球物理学家于1961年建立的，指出在平均原子量为的岩石和矿物中，弹性波传播速度與密度成线性关系。其数学式为： 其中为某类函数，为常数。 贝切定律所建立的弹性波速和材料密度的单一关系适用范围较广；不管由于晶体结构、压力、成份或温度所引起的变化，贝切定律都适用。有人用NaCl和KCl多晶做实验，压力高达17吉帕斯卡，NaCl体积压缩达百分之40，KCl体积压缩达百分之60的情況下，实验数据显示仍服从贝切定律。 (zh)
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  • January 2021 (en)
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  • Peculiar words "lender" and "damper"; possibly spelling (en)
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  • Birch's law, discovered by the geophysicist Francis Birch, establishes a linear relation between compressional wave velocity vp and density of rocks and minerals: where is the mean atomic mass in formula units and is an empirical function determined by experiment. (en)
  • 贝切定律（英文；Birch's law)，是美国地球物理学家于1961年建立的，指出在平均原子量为的岩石和矿物中，弹性波传播速度與密度成线性关系。其数学式为： 其中为某类函数，为常数。 贝切定律所建立的弹性波速和材料密度的单一关系适用范围较广；不管由于晶体结构、压力、成份或温度所引起的变化，贝切定律都适用。有人用NaCl和KCl多晶做实验，压力高达17吉帕斯卡，NaCl体积压缩达百分之40，KCl体积压缩达百分之60的情況下，实验数据显示仍服从贝切定律。 (zh)
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  • Birch's law (en)
  • 贝切定律 (zh)
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