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《奇幻科学城》揭秘太空生活 博士团带领萌娃尬运动

2017-05-06 06:01:19   

太空是个充满魅力的神奇世界,太空生活更令人心生好奇。上期节目邀请到中国空间技术研究院研究员庞之浩,带领大家了解了太空的饮食、洗漱和航天员的日常工作。本周五晚21:20,庞之浩研究员也将在节目中,与博士团和萌娃团再次踏上奇妙的太空生活探索之旅。

血液常温沸腾 气球放气呈直线运动

节目一开始,庞之浩说到尽管中国发射火箭技术成熟,领先世界,“神舟五号”发射仍曲折不断。而在进入太空后,宇航员除了要进行大量有趣的科学实验,还要到舱外开展工作,包括察看宇宙射线,进行大型航天器组装等。在舱外工作的过程中,宇航服尤为重要,现场用气球模拟宇航员,将充满气的气球放入玻璃杯罩后,开始抽真空,气球自动膨胀直到爆炸。将模拟血液的水放在其中,水竟然在常温中开始沸腾。

面对这令人目瞪口呆的现象,萌娃们纷纷猜测其中原因。庞之浩解释称,气球爆炸是因为在玻璃罩内大气压低,与地球大气压不平衡,从而炸裂。水在常温中沸腾是因为真空中沸点低。同时介绍到早在1965年世界行走第一人首次出舱时,遇到了这个问题,宇航员在执行完任务后归舱却遇到航天服膨胀的情况,最后通过放气安全回到舱内。

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