問題詳情
17. A 7.8-kg solid sphere, made of metal whose density is 2500 kg/ m3, is suspended by a cord. When thesphere is immersed in water (of density 1000 kg/m3), what is the tension in the cord?
(A) 16 N
(B) 30 N
(C) 46 N
(D) 61 N
(E) 72 N.
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增