Questions
国际科学 1A MS-ESS1-2：太阳系和银河系中的引力和运动 - 测验 2
Single choice
一颗彗星沿着一条非常细长的轨道运行，靠近太阳，然后向外飞去很远。对于定性模型来说，哪个表述最准确？
Options
A.由于太空是空的，因此彗星在任何地方都以相同的速度移动。
B.彗星在靠近太阳时加速，在远离太阳时受太阳引力影响而减速。
C.速度随机变化，与位置无关。
D.彗星只有离开太阳时才会加速。
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Step-by-Step Analysis
Question restatement: A comet travels along a very elongated orbit, speeds up when near the Sun, and slows down as it moves far away. Which qualitative statement best describes this behavior in a simple model?
Option A: 'Because space is empty, the comet moves at the same speed everywhere.' This is incorrect because there is a central gravitational force from the Sun that changes the co......Login to view full explanationLog in for full answers
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