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参宿四今年将爆发成超新星吗?
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2023-4-5 09:06
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最近多方报道:猎户座的 α 星(英文名 Betelgeuse,中文名 参宿四)随时都可能变成超新星。 预计该系统将在 2023 年产生一颗发光的红色新星,这是 10,000 年来的第一次! 参宿四是一颗红超巨星,位于猎户座,距离地球约 640 光年。 它是夜空中最亮、最著名的恒星之一,长期以来一直是天文学家和天文观测者着迷的对象。 近 ...
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个人分类: 行星观测|1608 次阅读|没有评论
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爱因斯坦与主流理论对功率与力关系式的不同解释
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2023-4-4 05:18
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管克英 北京交通大学理学院,数学系 Email : keying.guan@gmail.com 摘要:物质相互作用中功率 P 与对应的力 F 之间的关系式 P = F . v (*) 是基础的物理公式。然而,一个多世纪以来,在利用该公式研究光线照射到反射性物体表面形成的辐射 ...
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个人分类: 物理学、力学及自然哲学|1453 次阅读|1 个评论
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过去两天的金星、月牙与昴宿星团
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2023-3-27 06:43
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在刚过去的两天(美国加州,San Jose 当地时间 3 月 24 日和 3 月 25 日)的旁晚大约 8 至 9 点左右,向西部天空望去,可拍到非常浪漫的星空美景。24 日傍晚,初月恰好处在昴宿星团与金星之间(昴宿星团在上,月牙居中,金星居下) 昨晚,25日傍晚,月牙竟上升到与昴宿星团并肩的位置,它们显得出乎意料的近! ...
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个人分类: 行星观测|1492 次阅读|没有评论
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Rediscussing on the Force-Power equivalence
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2022-7-18 10:44
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in English and Chinese Keying Guan Department of Mathematics, School of Science, Beijing Jiaotong University Email: keying.guan@gmail.com Abstract: This paper will further accurately describe the equivalence relationship between force and power, point out that Einstein ...
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个人分类: 物理学、力学及自然哲学|1496 次阅读|没有评论
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Supplementary Explanation on "Force-Power Equivalence“
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2022-7-4 03:41
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关于“力-功率等价”的补充说明 (in English and Chinese) Since the author recently published two blog posts https://blog.sciencenet.cn/home.php?mod=spaceuid=553379do=blogid=1295413 and https://blog.sciencenet.cn/home.php?mod=spaceuid=553379do=blogid=1345496 It has ...
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个人分类: 物理学、力学及自然哲学|1138 次阅读|没有评论
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Force is equivalent to Power
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2022-7-2 11:51
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Keying Guan Department of Mathematics, School of Science, Beijing Jiaotong University Email: keying.guan@gmail.com Just as Einstein demonstrated that mass equivalent to energy, force is equivalent to power . This is implicit in modern analytical mechanics and revealed in the autho ...
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个人分类: 物理学、力学及自然哲学|1558 次阅读|没有评论
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没有不做功的力--马德堡半球实验、举重运动消耗的卡路里及辐射压公式
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2022-7-1 08:52
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管克英 北京交通大学理学院,数学系 Email:keying.guan@gmail.com Abstract: This paper points out that the combination of the law of conservation of energy and the law of conservation of momentum implies an important law that is often ign ...
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个人分类: 物理学、力学及自然哲学|3913 次阅读|1 个评论
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Relativistic elastic collision of two particles in 2D
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2022-2-4 05:10
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Guan Keying Department of Mathematics, School of Science, Beijing Jiaotong University Email: keying.guan@gmail.com Abstract: Under the framework of special relativity, this paper considers a basic problem of two-dimensional elastic collision, that is, i ...
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个人分类: 一般力学|2937 次阅读|4 个评论
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Light pressure fog caused by Maxwell-Bartoli formula
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2021-7-7 09:00
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Guan Keying Department of Mathematics, School of Science, Beijing Jiaotong University Email: keying.guan@gmail.com Abstract: It is proven that the so-called radiation pressure defined by the Maxwell-Bartoli formula is not mechanical pressure at all, causing confusion in d ...
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个人分类: 经典光学与量子光学|2230 次阅读|没有评论
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