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1. ### Confusions about electrons as a wave. (A bit long and stupid. Thanks you so much for taking time to see)?

... Equation is a very important equation in Quantum Mechanics, just as important as Newton's Laws in classical mechanics...

分類：科學及數學 > 物理學 2017年02月06日

2. ### Re: EPE of a neutral object?

...potential energy of the charges. This is analogous to the situation in mechanics in which a mass falls from a height. During the fall, energy is...

分類：科學及數學 > 物理學 2016年12月04日

3. ### 有無人識得做呢題Physics Question (Mechanics)？

Parabola: y(t) = pt^2 + qt + r y(2) = 4p + 2q + r = 0.75 ..... (1) y(3.3) = 10.89p + 3.3q + r = 1.2 ..... (2) y(4.5) = 20.25p + 4.5q + r = 0.9 ...

4. ### air is constantly pushing against us, ......... but it feels more like lighter than weight, since it pushes from inside.?

...negligible as such internal forces are usually weak, so in Newtonian mechanics, internal forces are omitted and he derives the formula...

分類：科學及數學 > 物理學 2015年08月30日

5. ### 物理 energy of electron, radius

... follows the definition in mechanics. Potential energy for repulsice force...paragraph to read as: This is simple mechanics, given the total energy ...

6. ### 去英國讀A Level! 求救!!

...野同係hk 學既有少少唔同, 而且有好多數要計(有一d 係同physics 有關, 如mechanics, 亦有一d 係同stats 有關), cover左好多唔同類型既數... 所以呢個你要睇下你... ...

7. ### Phy: concept of potential

In brief, "electric potential" is analogous to "height" in mechanics (i.e. in a gravitational field). 1. V = U/q is the definition ...

8. ### 推薦phy,chem書PLZ

Why not read materials on the web. The following physics web-sites are useful: 1. Hyper-physics: http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html ...

9. ### Fluid Mechanics

(i) Volume of box = (pi x 0.5^2) x 0.4 m^3 = 0.3142 m^3 Weight of box = 0.3142 x 900g N = 2827 N [Take g, the acceleration due to gravity, to be 10 m/s^2] ...

10. ### Mechanics

(a)(i) Acceleration from A to B = 20/4 m/s^2 = 5 m/s^2 Deceleration from C to D = 20/5 m/s^2 = 4 m/s^2 (ii) Total distance travelled = area of trapezium ...