SAT2物理
Aworkerhitsametalpipewithahammer.Theratiooftheintensityofloudnessasheardbypeoplestanding100metersawayfromtheworkertotheintensityasheardbypeoplestanding200metersawayfromtheworkeris
(A)4:1
(B)2:1
(C)1:1
(D)1:2
(E)1:4
希望不要只给个答案,最好给一下公式