# Yahoo奇摩 網頁搜尋

廣告

1. ### help!!!!!!

...be artificially produced by dissolving mined rock salt or by pumping water into wells drilled into rock salt. Natural brines always...

2. ### F.3 Maths

...circular cone of base radius 4cm and height 12cm is put into a ollow cylinder with the same base radius and height as the cone... 128Π. Later, some water is pumped out of the cylinder such that the depth of water becomes...

分類：科學及數學 > 數學 2007年04月14日

3. ### can you give me some air pressure exmaple?

...thumbtack applies more pressure because the point concentrates that force into a smaller area. Pressure is transmitted to solid...

... landed. The "liquid" waste is sent into space. Vacuum pumps are used to remove gas molecules from a sealed volume...

5. ### PHY HEAT

(1) Actual power used to heat water = 2520 x 0.9 = 2268 W Hence, temp. diff = 2268/(0.02 x 4200) = 27 C (2) Since swimming pool contains much more water than a cup of hot tea, the no. of water particles in swimming pool is much...

6. ### Physics(Latent heat) 4條問題

1. Amount of heat needed to melt all ice = 0.05 x (2050 x 15 + 334000) J = 18,238 J Heat provided by water when cooling to 0'C = 0.2 x 4200 x 25 J = 21,000 J Hence, final temperature of mixture = (21000 - 18238)/[(0.2+0.05) x 4200] '...

...補充： In some cases, the pipette can be replaced by continuously pumping the gas into the limewater with a rubber tube with a dropper at one end.

分類：科學及數學 > 化學 2007年09月05日

8. ### 有汽涼茶是否可行?

I will answer it in english. Soft drink have gas becuase the producer pump carbon dioxide (二氧化碳) into the drink. Carbon dioxide will &#39; dissolve &#39; in the solution and form...

分類：科學及數學 > 化學 2007年03月30日

9. ### 我架車打唔到呔氣 ??

有機會係氣咀內之"蕊"老化, 去零件鋪買過新的, 如有小匙, 可以自己換, 亦可去車軚店求助, 不貴的! 呔尺唔準 - It may lead to a slight vibration or 搶軚 while the car is running. And, the tyres may be depreciated faster than normal . I...

10. ### 唔識呀~咩野叫做double circulation

...the characteristic blood circulatory system. The heart is divided into two halves, each half working as a separate pump . One side of the heart pumps blood to the lungs and back to the...

分類：科學及數學 > 生物學 2007年08月24日

廣告