SAT2物理A worker hits a metal pipe with a hammer.The ratio of the intensity of loudness as heard by people standing 100 meters away from the worker to the intensity as heard by people standing 200 meters away from the worker is(A)4:1(B)2:1(C)1:1(D)

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SAT2物理Aworkerhitsametalpipewithahammer.Theratiooftheintensityofloudnessasheardbypeoplestanding100met

SAT2物理A worker hits a metal pipe with a hammer.The ratio of the intensity of loudness as heard by people standing 100 meters away from the worker to the intensity as heard by people standing 200 meters away from the worker is(A)4:1(B)2:1(C)1:1(D)
A
声音是向四面八方传播的,基其能量是在一个以worker为中心的球上分布的.所以啊,响度就可以这样来比拟E/(4π*R^2).所以响度是与听的人worker的距离的平方成反比的.

SAT2物理A worker hits a metal pipe with a hammer.The ratio of the intensity of loudness as heard by people standing 100 meters away from the worker to the intensity as heard by people standing 200 meters away from the worker is(A)4:1(B)2:1(C)1:1(D) 一道SAT2物理A worker hits a metal pipe with a hammer.The ratio of the intensity of loudness as heard by people standing 100 meters away from the worker to the intensity as heard by people standing 200 meters away from the work is A 4:1 B 2:1 C 1: 求sat2物理公式求sat2物理公式 SAT2物理基础题 SAT2物理一题求sat2物理普林斯顿 SAT2 物理数学历史真题有卖吗? sat2物理考多久啊? sat2物理考不考光的衍射 A breeze hits the tree. SATII (关于声波)A worker hits a metal pipe with a hammer.The ratio of the intensity of loudness as heard by people standing 100 meters away from the worker to the intensity as heard by people standing 200 meters away from the worker is A 4:1B 2:1 A worker hits a metal pipe with a hammer .The ratio of the intensity of loudness as heard by people standing 100 meters away from the worker to the intensity as heard by people standing 200 meters away from the worker is________.........本题为计深圳哪里有SAT2数学、SAT2物理、SAT2化学的辅导? SAT2 Sat2 翻译(a social worker) 如何复习sat2物理和化学?