Help kids about elementary math

Unique, talented, one of a kind music legend. Remembering Prince

I am not very familiar with his music. Just knowing "When doves cry" and "Purple rain" by Prince. But I like the ways he performed "Purple rain" both in the movie and in the Super Bowl half-time show some years ago. Prince will be missed by many.

Linux network tip

When trying to activate eth# in a Linux PC, one might get error message similar to "linux network Determining IP information for eth1 failed no link present check cable"

I found out one solution on the internet and it worked for me. Below is another copy of the solution.

Edit /etc/sysconfig/network-scripts/ifcfg-eth1, (when working with eth1)
#add following 3 lines at the bottom of the file:

check_link_down() {
  return 1;
}

Open terminal and issue command:

ifup eth1

It works on a Red Hat Linux under root account.

Bohr Magneton

L. Pauling & E.B. Wilson Jr. explained Bohr magneton in their 1935 classic "Introduction to Quantum Mechanics". This note is to understand it in SI units with current constant values. And it's just for me to have some idea about the magnitude of the constants. "goldbook" at iupac.org is recommended to find out the exact constant values including Bohr magneton.

Based on the book, magnetic moment of 1 Bohr magneton is he/(4πmc).

where at that time,

Planck constant h=6.547e-27 erg sec (1 erg =1e-7 Joules,)

electron charge e=4.770e-10 abs e.s.u. (absolute electrostatic unit, or statcoulomb)

electron mass m=9.035e-28 g

speed or velocity of light c=2.99796e10 cm /sec

It was given that Magnetic moment of 1 Bohr magneton μ₀ = 0.9175e-20 erg/gauss

Nowadays,

h=6.626e-34 Js

e=4.8025e-10 abs e.s.u., or

e=1.602e-19 C (note if using 1.6e-19C, speed of light should be removed in the equation. Note that e in unit C is smaller by a factor of c, the speed of light, compared to e in e.s.u.)

m=9.109e-31 kg

c=2.99792e8 m/s

1 Bohr magneton μ₀ = 9.274e-24 J/T

To roughly check the result, 1 erg = 1e-7 J, 1 gauss = 1e-4 T. Therefore, the two values are reasonably close to each other.

On iupac goldbook website, Bohr magneton μ_B = 9.2740154e-24 J/T

Songs ~30 Years Ago

Billy Ocean's "Caribbean Queen (No More Love On The Run)" and Ray Parker Jr.'s "Ghostbusters". I first heard these two songs around 1986 when I was in a small city in China. I still like these songs 30 years later.

Journey To The West 敢问路在何方

Journey To The West
敢问路在何方 （1986版电视剧《西游记》主题曲）

许镜清谱曲
阎肃（1930.5.9—2016.2.12）  作词
张暴默（首唱）
蒋大为（唱）

你挑着担，我牵着马；
迎来日出送走晚霞。
踏平坎坷成大道，
斗罢艰险又出发，又出发。
啦啦——啦啦啦啦啦啦啦啦，
一番番春秋冬夏，
一场场酸甜苦辣；
敢问路在何方？
路在脚下。
你挑着担，我牵着马；
翻山涉水两肩霜花。
风云雷电任叱咤，
一路豪歌向天涯，向天涯。
啦啦——啦啦啦啦啦啦啦啦，
一番番春秋冬夏，
一场场酸甜苦辣；
敢问路在何方？
路在脚下。
敢问路在何方？
路在脚下。

"父子" A Chinese Song Called "Father and Son"

崔恕创作的"父子"经过老一代歌唱家佟铁鑫和年轻歌手杨洋在春晚演绎后估计要一夜走红.这首歌曲出自崔恕2013年11月份出的"长生不老"专辑.歌曲的词曲都挺好.感人.我通过春晚才知道这首歌曲. 赵佳霖编曲的春晚版本除去了一小节, 大约30秒. 当然丝毫没有影响整首歌的效果.

父子
作词：崔恕
作曲：崔恕

编曲: 赵佳霖(春晚版本)
演唱: 佟铁鑫, 杨洋

(杨)如果你是一棵参天大树
我就是一粒种子
你宽大的树荫把我守护
我每天眺望你的高度
(佟)等到有一天你慢慢长大
也许我的枝干早已干枯
无论你的繁华蔓延何处
不要忘记脚下那片泥土

(杨)我知道你的辛苦 明白你的付出
却忘了如何跟你相处
(合)我们都不善表露 可心里全都清楚
这就是血脉相传的定数
(佟)我心里有满满的爱 可是说不出
只能望着你远去的脚步 给你我的祝福
(杨)我心里有满满的爱 可是说不出
你是世间唯一的男人 让我牵肠挂肚

(杨)我知道你一直默默关注
无论我光荣或屈辱
#(佟)无论成功失败都别太在乎
#要懂得忍让学会知足
*(父)无论成功失败都别太在乎
*一定要把自己好好照顾
*(子)你给我的不只身体发肤
*还有理解与宽恕
*(父)你会自己面对慢慢长路
*要懂得忍让学会知足

*(子)我知道你的辛苦 明白你的付出
*却忘了如何跟你相处
*(合)我们都不善表露 可心里全都清楚
*这就是血脉相传的定数

(佟)我心里有满满的爱 可是说不出
只能望着你远去的脚步 给你我的祝福
(杨)我心里有满满的爱 可是说不出
你是世间唯一的男人 让我牵肠挂肚

(佟)我害怕有一天自己苍老
成为你的包袱
(杨)我会在你身旁把你搀扶
就像当初
你带着我走出人生第一步
---END---
#春晚版本
* 原唱版本