本题目来源于试卷: Fluid Mechanics，类别为 美国物理杯赛(Physics Bowl)
[单选题]
12.21: A child’s balloon is filled with pure Xenon gas. ++ird cca4ne o :tqwpl(3/)2k yz14vga4h ilnThis balxgzvsxzb11i+ fs t2 71loon then is released from rest two meters above the ground on Earth. Which one of the 1iz 1zs1g2s7txb+x fvfollowing choices best describes the response of the balloon?
A. The balloon immediately falls toward the ground.
B. The balloon floats gently in the air, finally reaching the ground after several minutes.
C. The balloon floats gently in the air, essentially hovering at the same height for at least a day.
D. The balloon very, very slowly and gently rises upward.
E. The balloon rapidly rises into the sky.
参考答案: A
本题详细解析:
暂无
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