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  1. mechanics 相關
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  1. 排列方式

  1. (a) Use equation En = (n.h)^2/8mL^2 where En is the energy of electron at n-th quantum state h is Planck's constant (= 6.63 x 10^-34 m^2.kg/s) m is the ...

  2. (a) (i) Acceleration = force/mass = 27/6 m/s^2 = 4.5 m/s^2 (ii) Displacement = (1/2).(4.5).(6^2) m = 81 m (b) Vertical forces in equilibrium: T.cos(theta) ...

  3. (a)(i) Acceleration = (52 - 0.3 x 8g)/8 m/s^2 = 3.5 m/s^2 where g is the acceleration due to gravity, taken to be 10 m/s^2 (ii) Displacement = ...

  4. You have put so many questions in one post. I could only give you the hint without exceeding the word limit. 1. R1 + R2 = 2500 + 5000 10(R1) = 2500 x 9 + ...

  5. 1. (a) u = 15 m/2 v = 25 m/s t = 5s v = u + at 25 = 15 + a(5) Acceleration, a = 2 m/s² (b) Distance travelled, s = [(15 + 25)/2] × 5 = 100 m ==== 2. ...

  6. (a) Upthrust acting on block A = (3.85 x 10^-3)pg where p is the liquid density and g is the acceleration due to gravity Hence, (3.85 x 10^-3)pg + 1.4g + ...

  7. Pressure difference at 8.2m of water = 8.2 x 1000g Pa = 82 000 Pa = 82 kPa where 1000 kg/m^3 is the density of water, and g is the acceleration due to ...

  8. ... agree the approximation, but I want the theory in Newtonian mechanics. A: The 1/2 in classical mechanics is becuase of the...

  9. ...其實上面都已經講得很明白:) 不過我再加點例子吧:) 高中的PHY : (i)Mechanics : e.g.物件由高處掉下來 最後的速度計算 (ii)Heat : e.g.兩個不溫度...

  10. ... pursuit of a theory of everything, the merging of general relativity and quantum mechanics (or quantum field theory) into a more general theory of ...