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1. 使用示波器做實驗與到的一些問題

...voltage, detectable by the CRO. When you touch the cables with two hands , the CRO tends to measure the potential difference between the two ...

2. 二手煙有咩害處?10分

... Tobacco Smoke, ETS)，或「二手煙」 ( Second - hand Smoke)，是來自香煙、煙斗或雪茄燃燒時所產生、以及吸煙 者...

3. 甚麼是 Fleming s left hand rule?

...finger is the magnetic field B The second finger is the of current I There also exists Fleming's right hand rule (for generators). The appropriately- handed ...

4. Cooling graph of two metals

...and T2 are the rate of fall in temperature for the two metals rexpectively i.e. c1/c2 = T2/T1... (3) is also wrong. When you hand touches metal Q with your hand , the temperature...

Use equation of motion: s = vt - (1/2)gt^2 for the upward journey with s = 37.5 ft., v = 0 m/s, t = 5/2 s = 2.5 s, a = -g (the acceleration due to gravity) Hence, 37.5 = -(1/2)(-g).(2.5^2) g = 2 x 37.5/2.5^2 ft/s^2 = 12 ft/s^2 p.s. The correct value of g on earth should be 32 ft/s^2. Please check if the given...

6. Physics easy question 10 marks

... distance between the ceiling and her hands is 2.8m b)Not safe. When ...would make when she jumps at eight metres per second .So when she jumps, she will hit the ...

7. Can oil dissolves in hot water?

http://en.wikipedia.org/wiki/Oil It says, &quot;Oil, in a general sense, is a chemical compound that is not miscible with water....&quot; click the word &quot;miscible&quot; and you&#39;ll have a full explanation: &quot;The chemistry term miscible refers to the...

8. spring

...compress if you slowly lower the block to the point where you can remove your hand without disturbing it. c)why are the two answers different? Ans: a) if the block is let go ...

9. Physics HW

...the principle to be used is: Convex lens: For any two parallel light rays incident onto the lens, they must meet at a point on the focal...

10. a magnectic field question

By using the right hand grip rule, the currents should be anti-parallel, i.e. in opposite directions...