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本篇文章给大家谈谈月球有引力吗,以及月球有地心引力吗对应的知识点,希望对各位有所帮助,不要忘了收藏本站!

内容导航:
  • 月球有没有引力?
  • 月球有引力吗
  • 月球上有引力吗?
  • 月球上有重力吗?
  • 月球上有没有吸引力?
  • 月球有引力吗?

Q1:月球有没有引力?


有吸引力。根据牛顿的万有引力定律,任何物体都有引力。


引力定律:两物体间的引力与它们的质量成正比,与距离的平方成反比。即F=GMm/R^2,G是引力常量,为6.67*[10^(-11)] N*m^2/kg^2。


根据这个公式,月球直径约3476公里,是地球的1/4。体积只有地球的1/49,质量约7350亿亿吨,相当于地球质量的1/81,月球表面的重力差不多是地球重力的1/6。


扩展资料:


若将行星的轨道近似的看成圆形,从开普勒第二定律可得行星运动的角速度是一定的,即: (T为运动周期)


如果行星的质量是m,离太阳的距离是r,周期是T,那么由运动方程式可得,行星受到的力的作用大小为


另外,设k′为常数,由开普勒第三定律可得k′= 


行星受到的力的作用大小为:


代入上式的k′的值,得行星受到的力的作用大小为:


由作用力和反作用力的关系可知,太阳也受到以上相同大小的力。设太阳的质量为M,从太阳的角度看,太阳受到沿行星方向的力为


因为行星受到的作用力和太阳受到的作用力是相同大小的力,由这两个式子比较可知,k′包含了太阳的质量M,k″包含了行星的质量m。由此可知,这两个力与两个天体质量的乘积成正比,它称为万有引力。


如果引入一个新的常数G(称万有引力常数),再考虑太阳和行星的质量,以及先前得出的4·π2,那么可以表示为:万有引力  ,(G=6.67×10-11 N·m2 /kg2)。


这种现象用万有引力定律无法解释,而根据广义相对论计算的结果旋紧是每世纪43.0″,在观测误差允许的范围内。此外,广义相对论还能较好地解释谱线的红移和光线在太阳引力作用下的偏转等现象。这表明广义相对论的引力理论比经典的引力理论进了一步。


参考资料:百度百科——万有引力定律


今日天气详情" target="_blank" onClick="allCount('首页_点击_实况天气_实况天气')"> 1 °

本篇文章给大家谈谈月球有引力吗,以及月球有地心引力吗对应的知识点,希望对各位有所帮助,不要忘了收藏本站!

内容导航:
  • 月球有没有引力?
  • 月球有引力吗
  • 月球上有引力吗?
  • 月球上有重力吗?
  • 月球上有没有吸引力?
  • 月球有引力吗?

Q1:月球有没有引力?


有吸引力。根据牛顿的万有引力定律,任何物体都有引力。


引力定律:两物体间的引力与它们的质量成正比,与距离的平方成反比。即F=GMm/R^2,G是引力常量,为6.67*[10^(-11)] N*m^2/kg^2。


根据这个公式,月球直径约3476公里,是地球的1/4。体积只有地球的1/49,质量约7350亿亿吨,相当于地球质量的1/81,月球表面的重力差不多是地球重力的1/6。


扩展资料:


若将行星的轨道近似的看成圆形,从开普勒第二定律可得行星运动的角速度是一定的,即: (T为运动周期)


如果行星的质量是m,离太阳的距离是r,周期是T,那么由运动方程式可得,行星受到的力的作用大小为


另外,设k′为常数,由开普勒第三定律可得k′= 


行星受到的力的作用大小为:


代入上式的k′的值,得行星受到的力的作用大小为:


由作用力和反作用力的关系可知,太阳也受到以上相同大小的力。设太阳的质量为M,从太阳的角度看,太阳受到沿行星方向的力为


因为行星受到的作用力和太阳受到的作用力是相同大小的力,由这两个式子比较可知,k′包含了太阳的质量M,k″包含了行星的质量m。由此可知,这两个力与两个天体质量的乘积成正比,它称为万有引力。


如果引入一个新的常数G(称万有引力常数),再考虑太阳和行星的质量,以及先前得出的4·π2,那么可以表示为:万有引力  ,(G=6.67×10-11 N·m2 /kg2)。


这种现象用万有引力定律无法解释,而根据广义相对论计算的结果旋紧是每世纪43.0″,在观测误差允许的范围内。此外,广义相对论还能较好地解释谱线的红移和光线在太阳引力作用下的偏转等现象。这表明广义相对论的引力理论比经典的引力理论进了一步。


参考资料:百度百科——万有引力定律


今日天气详情" target="_blank">阴
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蓝庆新:在“一带一路”建设中共享发展经验

    蓝庆新"In the five years since the 18th CPC National Congress in 2012, China has invested more than ever before in poverty relief, and President Xi Jinping has vowed to eliminate poverty by 2020," Cho noted

    设中共[Photo/Agencies]BANGKOK - Thailand's Supreme Court on Wednesday found former Prime Minister Yingluck Shinawatra guilty of malfeasance in a loss-ridden rice subsidy program and sentenced her in absentia to five years in jail享发展Yingluck did not show up at the court and has so far not made any public comment on the verdict

    蓝庆新:在“一带一路”建设中共享发展经验

    经验In an announcement released by the court, it read that even though the unmilled rice program was an act according to government policy that the cabinet had stated to the National Assembly, if the implementation of such policy was not in accordance with law, such acts could be inspected by the judicial process蓝庆新Prime Minister Prayut Chan-o-cha said on Tuesday that he knows where the ousted former prime minister is but will not disclose her whereabouts until the verdict is delivered设中共After a trial running over two years, the Supreme Court's Criminal Division for Holders of Political Positions began reading the verdict at 11 am local time and continued for nearly four hours享发展The subsidy scheme did not work, costing the country 8 billion US dollars and leaving it with vast stockpiles of rice经验It was reported that she had fled to Dubai where her brother, former Prime Minister Thaksin Shinawatra, lives in self-imposed exile avoiding a 2008 sentence for corruption

    蓝庆新Her lawyer said she was ill with an ear problem and could not appear in court设中共The verdict was supposed to be read on Aug 25, but Yingluck, the country's first woman prime minister, failed to show up享发展" The scientist was awarded the Shanghai Magnolia Silver Award on Sept 6 for his contribution to the city's efforts to build a global science and technology hub

    经验Earlier in his career, he also received the Royal Australian Chemical Institute's H蓝庆新Since taking charge, his research center has published a series of academic papers in major scientific journals, including Nature, which has helped raise Shanghai University's international profile设中共Despite only arriving in China three years ago, Australian professor Jeffrey Reimers has already had a significant impact on Shanghai's scientific community享发展All these things are global issues that affect China, and China is doing its share to address these key issues

    He is currently working on a project that involves protein crystallography, a vital element in drug design, and is collaborating with prominent Chinese scientist Hong Guo on research into silicon electronicsThree or four years ago, when my family and I were on the subway or a bus in Shanghai, people around would talk to us

    蓝庆新:在“一带一路”建设中共享发展经验

    I once had a student come visit me and he was almost in tears after having to cross a road"Hopefully when I'm done with my work here, the connection between the two universities will be further strengthened, and through that I will leave a legacy," Reimers saidShe now speaks perfect Chinese and even has a Beijing accentWhat's the biggest challenge China faces today, and how do you think the country can overcome this? People focusing too much on themselves and the building of wealth, instead of interest for the community and the country

    China needs to teach people in these countries how to go about managing certain issues, such as ensuring good government, how to prevent corruption, and how to focus on development in a sustainable way with clear end goalsChina's five-year plans provide a purpose and focus, and any developing country needs such plans to have a long-term futureTaxi drivers are always happy to talk about lots of different topicsDo you believe some of China's experiences or practices could be used to solve pressing global problems? Many countries are in the position China was 40 years ago, and the lessons learned here in China are certainly appropriate for them

    To see that happening and to be a part of it in my own little way is very specialIn terms of challenges in the field of science, environmental damage and sustainability would be core issues

    蓝庆新:在“一带一路”建设中共享发展经验

    What three words would you use to describe China? Unified, together, visionChina needs to expand its reputation and abilities in these areas

    "I'm very happy to work on the advancement of science in ChinaComing up with better, cleaner methods for creating chemical reactions when generating power is going to be importantHe showed interest in the recommendations and comments that were put together by the foreign experts and even described how the recommendations would be looked at by the appropriate committeesPresident Xi came across as someone who cares for his people, his country, and the worldThat just shows how accepted we have been here in ChinaBut what I have found disturbing is that this happens rarely today, as everyone is glued to their phones

    She was recently on the stage making the pledge to the Party on behalf of all the students who were receiving honglingjin (the red scarves worn by Chinese Young Pioneers)But all that is changing for the better due to efforts from the Shanghai government

    People moving together as one and with a vision is a great strength to have indeedWhen we arrived from Sydney a few weeks ago and got into a taxi, the driver was talking to us for an hour and a half

    What do you feel has been China's biggest achievement in recent years? I read a report that about 95 million people were taken out of poverty in China over the past decade, and that's a really significant achievement that reflects 40 years of amazing achievements in ChinaChina needs to teach other countries how to do this

    The document was struck by China, the Democratic People's Republic of Korea (DPRK), the United States, the Republic of Korea (ROK), Russia and Japan during the fourth round of the six-party talksChinese Foreign Ministry spokesperson Lu Kang made the remarks at a routine press briefing, saying China is open to all efforts that are conducive to solving the issue peacefully via political and diplomatic meansIn return, the United States promised not to use nuclear weapons or conventional weapons to attack or invade the DPRKIn the statement, the DPRK reaffirmed its commitment to abandoning nuclear weapons and existing nuclear programs

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    BEIJING -- China said Tuesday that the six-party talks are still an efficient platform to address the Korean Peninsula nuclear issueLaunched in 2003, the six-party talks were suspended in December 2008

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