理解物理 equations 既問題 PLZ COME :)

Most of these physical constants appear in equations as proportional constant. These constants were determined using experimental methods.

For exmaple, the experimental determination of the Universal Gravitational Constant G is said to be first performed by Henry Cavendish in 1798 using a "torsion pendulum". But it was actually determined by C.Y. Boys in 1894 who used Cavendish's torsion pendulum data.

You could refer to the short article on the following web-page:

http://paul-a-heckert.suite101.com/understanding-the-cavendish-experiment-a85849

The value of G is refined further with new experiments as technology and equipment advances.

Other physical constants were also determined by experimental methods. Only a few of them can be evaluated mathematically with new physics theories and knowedge.

我可以話你知所有equation都係咁搵出來既
第一 , 搵可變量 , 即variable
做實驗
我地知道
g同M成正比
g同r既二次方成反比
咁我地就可以知道
g同M/rr成正比
之後俾一個數字(常數) 佢 , 令佢地相等
所以 g=GM/rr (G係一個常數)
G=grr/M