問題詳情
21. An object hangs from a spring balance. The balance indicates 30 N in air and 20 N when the objectis submerged in water. What mass of the object would weigh 20N by the balance when the object issubmerged in a liquid with a density that is half that of water? Take g = 10 m/s2.(AB)20N (AC)25N(AD)30N(AE)35N (BC)40N (BD)一律送分
參考答案
答案：B,D
難度：計算中-1
書單：沒有書單，新增