本题目来源于试卷: Physics Unit10: Fluids Related Topics，类别为 通用国际物理
[单选题]
A crane lifts a steel sub t; (o+qa-vfajmarine (densitd ,. /h7rehwity = $7.8 \times 10^3 \; kg/m^{3}$) of mass 20,000 kg. What is the tension in the lifting cable (1) when the submarine is submerged, and (2) when it is entirely out of the water?
A. (1) $2.0 \times 10^{5} \; N$ (2) $1.7 \times 10^{5} \; N$
B. (1) $1.7 \times 10^{5} \; N$ (2) $2.0 \times 10^{5} \; N$
C. (1) $2.6 \times 10^{3} \; N$ (2) $2.0 \times 10^{5} \; N$
D. (1) $2.0 \times 10^{5} \; N$ (2) $2.6 \times 10^{3} \; N$
参考答案: B
本题详细解析:
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