S/2003 J 2 is a retrograde irregular satellite of Jupiter. The moon was discovered on 5 February 2003 by a team of astronomers from the University of Hawaii led by Scott S. Sheppard and David C. Jewitt, and was later announced on 4 March 2003.

2003年3月4日 · S/2003 J 2 is a retrograde irregular satellite of Jupiter. The discovery, by a team of astronomers from the University of Hawaii led by Scott S. Sheppard and David C. Jewitt, was announced on March 4, 2003.

伏特的一种定义是，如果 1 库仑的电荷在两点间移动，电势能变化了 1 焦尔，那么这两点间的电势差定义为 1 伏特。 联系公式 W = qU，就有 1\,\text {J} = 1\,\text {V} \cdot \text {C} = 1\,\text {V}\cdot\text {A}\cdot\text {s}。 你看，其实也没有用到基本单位安培的定义。 谢邀。 这个... 我们初高中物理中的字母多用，包括大小写等等。 这个东西不解释。 至于物理量的表示，我们知道SI制：七个基本单位：长度m，时间s，质量Kg，热力学温度K，电流A，光强度cd，物质的量mol. …

Jupiter LII, originally known as S/2010 J 2, is a natural satellite of Jupiter. It was discovered by Christian Veillet in 2010. [2] It received its permanent number in March 2015. [3]

The joule-second (symbol J⋅s or J s) is the unit of action and of angular momentum in the International System of Units (SI) equal to the product of an SI derived unit, the joule (J), and an SI base unit, the second (s). [1]

2014年10月26日 · <s^2>=s(s+1)，若s=2, 则<s^2>=6。 另外，若S=2，则S的z分量<Sz>为0, +1/-1, +2/-2，总共5个数值，所以是五重态。 即<Sz>的绝对值不能超过S，且各个<Sz>的取值相差1。

2017年4月14日 · The SJ2, with wireless subwoofer, is a space-saving system that still delivers a refined cinema experience. An outboard wireless subwoofer can drastically improve the cinematic audio experience, adding room-shaking bass to movies and more.

J-2发动机 是一款液态燃料低温 火箭发动机，曾被用于 NASA 的 土星1B号运载火箭 和 土星5号运载火箭。 J-2发动机由 Rocketdyne 在美国制造，以低温 液氢 (LH2) 和 液氧 (LOX) 为推进剂，每台发动机在真空中能产生1,033.1 kN（232,250 lb f） 推力。 发动机最初的设计可以追溯到1959年 Silverstein委员会 （英语：Silverstein Committee） 的建议。 Rocketdyne在1960年6月获得了研发J-2发动机的许可，初次飞行（AS-201 （英语：AS-201））在1966年2月26日进行。 J-2发动 …

Discover the LG 2.1 Channel Sound Bar that features 160 Watts and Bluetooth® Connectivity. Find reviews, specs, and more for SJ2.

2012年6月12日 · Astronomers have pinned down details of Jupiter's smallest known moon, a tiny space rock barely a mile across. The moon, known as S/2010 J 2, was discovered in September 2010 along with a...