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1. ### How to derive the effective mass of spring? include formula.

...ky ,where y is the displacement and positive k is known as the stiffness .(Hooke&#39;s law) (2)F[friction] = -by&#39; ,where positive b...

2. ### breaking force

...to the increasing elongation. Hence, it is -ve. 3. No. Stiffness and strength are different. Stiffness is measured by...

3. ### (修復/切除)半月瓣手術前後~~能否完全康復~~繼續做劇烈運動

...feel pain, swelling and increase temperature over knee joint.beside, the knee joint may stiffness that is cannot fully bend or extend the joint firstly, u can use ice...

分類：一般保健 > 創傷 2007年10月28日

4. ### velocity of sound

...fact, c = √( C / ρ ) c = The speed of sound C = a coefficient of stiffness ρ = density The coefficient of stiffness relates to the strength of the...

5. ### Young Modulus/breaking stress

No. Young's Modulus measures the stiffness of a material, whereas breaking stress is represented by the strength of the material, which indicates how much force the material can support.

6. ### 為什麼以固體傳遞聲波比液體、氣體的介質大?

c = √( C / ρ ) c = The speed of sound C = a coefficient of stiffness (硬挺度/抗撓性) ρ = density －聲波是透過粒子的震動來傳遞。 －聲速是取決於...

7. ### physics tension in a string

Use Hooke's Law: force = ( stiffness constant) x (extension of string)

8. ### 網球拍RDS 003 MID PLUS 的資料

...315g Balance: 6pts Head Light Swingweight: 315 Stiffness : 65 Beam Width: 20-24 mm Composition:Graphite...

分類：體育 > 網球 2007年08月23日

9. ### 如果D字轉左NOUN

adjective to noun dyeable-dyeability染色性flammable-flammability易燃性heat sensitive-heat sensitivity熱敏感性resilient-resilence回彈性stiff- stiffness 剛硬度abrasion resistant-abrasion resistance耐磨損性warm-warmth溫暖性soft-softness柔軟性

分類：社會及文化 > 語言 2012年04月04日

10. ### physic.........

...600 kg block attached to a fixed horizontal spring whose spring stiffness constant is 7.50x103 N/m and sets it into vibration with an amplitude...