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1. ### phy mc...(ERGENT!)

Resistance of the 220 V bulb , Ra = Va^2 / Pa = (220)^2 / 60 = 806.67 ohm Resistance...

2. ### phy ce 2007 mc q23

... depends on the power dissipated by the light bulb P. To obtain the maximum brightness, we have to maximize the current through bulb ...

3. ### Eng Compo ERGENT!!!

... invented more than 2,000 electrical appliances. e.g. light bulb Before the light bulb was invented, we had to use...

4. ### 英文閱讀理解

...read an article about electric last night. The (a).____invention_____________of light bulbs has greatly improved out lives.Today, we can choose...

5. ### phy] 一題有關transformer的mc~

...點解係correct? 呢條個ans 係: D (1) S closed but voltage of bulb P does not change, ie no change brightness of bulb P. (1) ...

6. ### 英文人請進

...great help of environmental' issies. It can replace one regular light bulb with a compact fluorescent light. In this way; the carbon dioxide can be save 15...

7. ### 40點!!我最喜愛的季節英文短講 2min

... have a gleaming display. Mounted with lights and bulbs as bright as day. It's lovely 'cause though winter lacks color...

...can help you a lot in composition. &quot;Learning composition&quot; (with a bulb 電燈胆 on its cover). This book written in good English...

9. ### phy mc qs.......

Length of mercury thread changes in direct proportion to the liquid temperature. Melting Ice = 0 deg C Steam = 100 deg C Let y be the temperature of the liquid: (y-0)/(100-0)= (12-30)/(180-30) therefore y = -12 deg C or Answer is...

10. ### phy electric circuit的問題

每個燈泡的電阻=V2 /P =2202 /30 =1613 ohm 當三個燈泡串聯連接至220V電源時, 每個燈泡的電勢差=220 /3 V 總功率消耗=3 x [(220 / 3)2 /1613]=10W

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1. ### 相關詞

 light bulb scanner bulb bulb醫學 lily bulb led bulb 相機bulb bulb 快門 time快門