# Yahoo奇摩 網頁搜尋

1. ### A-Level Physics- Work

...small element from the edge. 0<= y <= x/4 To raise the small element up on the edge, the work done = dm gy = pgydy To find...

2. ### mgh ~~

...that PE=mgh means that the ENERGY NEEDED TO RAISE THE OBJECT, that energy will be stored in PE. E...

3. ### Phy 練習中2條諗唔通- - F4

...呢個ge work done係垂直..即係mgh the energy is needed for raised at 2ms-1... P=E/t 15x1000=mgh per s/t(per s) 15000w=m x10x2 m=750kg...

4. ### 有關電學(phy)

...by vigorous collisions because of the heat of the flame. The flame raises the temperature of the air surrounding it, thus causes the air ...

5. ### Phy Heat

...1000 X 10 X 60 = 600 000 J Energy required to raise the temperature of the water from 20*C to 100*C = (0.5)(4200)(100 - 20...

6. ### heat question

...kg Now, Energy lost as heat by the drill is used to raise the tempature of the iron and water So, E = (mc + MC)(T2...

7. ### 假如化學物A沸騰點比B低，用A溫度計可唔可以量度倒B沸騰點o既溫度?

...under pressure. As such, its boiling point has been raised so that it can be used to measure temperatures above its normal...

8. ### 坐飛機時為什麼see唔到月光和星星?

you can see everything at daytime... you can see the sun... no matter sun raise or sun set.. at nighttime... you can see the moon and stars please book a seat near the window thanks