F.3 Physics (urgent) [復制鏈接]

引用第14樓麥精於2007-01-08 21:00發表的“”:
SPECIFIC就有 [表情]
l=E/m

e個係Latent heat of fussion

係咪d liquid轉哂做GAS?

去左邊?

MOUSE SHORT JOR

D YEH DIU CHUN SAI

2. An immersion heater of power 200W can boil away a liquid of boiling point of 80°C at a rate of 1.6 x 10^-4 kg s^-1 . Assuming all the energy given out by the heater is absorbed by the liquid, find the specific latent heat of vaporization of the liquid.


1.6 x 10^-4 x lv=200

lv=1250000

引用第34樓ｊ摩連奴．狂妄於2007-01-08 21:49發表的“”:
2. An immersion heater of power 200W can boil away a liquid of boiling point of 80°C at a rate of 1.6 x 10^-4 kg s^-1 . Assuming all the energy given out by the heater is absorbed by the liquid, find the specific latent heat of vaporization of the liquid.
1.6 x 10^-4 x lv=200
.......

點解?

WT IS lv?

引用第35樓abbrian2005於2007-01-08 21:52發表的“”:
點解?

Energy=mass x latent heat of vapouration

Energy=Power X Time

引用第36樓麥精於2007-01-08 21:52發表的“”:
WT IS lv?

latent heat of vapouration

引用第37樓ｊ摩連奴．狂妄於2007-01-08 21:53發表的“”:
Energy=mass x latent heat of vapouration
Energy=Power X Time

E=Mc Delta T wor

Energy=mass x latent heat of vapouration

Energy=Power X Time

Power X Time=mass x latent heat of vapouration

200 X 1=1.6 x 10^-4 x lv

lv=1250000

引用第39樓abbrian2005於2007-01-08 21:54發表的“”:
E=Mc Delta T wor

岩..不過依度溫度冇變..何來Delta T

引用第40樓ｊ摩連奴．狂妄於2007-01-08 21:55發表的“”:
Energy=mass x latent heat of vapouration
Energy=Power X Time
Power X Time=mass x latent heat of vapouration
.......

TIME =1?

我諗既方法岩架，係唔識計ja~

引用第42樓abbrian2005於2007-01-08 21:57發表的“”:
TIME =1?

a rate of 1.6 x 10^-4 kg s^-1

per second嘛