FreedomJustice

Concept Test (2001)
A melting ice block of mass 0.05kg is mixed with x kg of water at 0(the temp) in a well -insulated container.
If 25000J of energy is supplied to the mixture , the mixture changes to water at 4(the temp)
Find the value
(Give: specific latent heat of fusion of ice = 3.34x10^5J/kg
S.H.C. of water = 4200J/kg)
a:0.37
b:0.44
c:0.49
d:1.44
   




the ans is B

[ 本帖最後由 鍾倩怡 於 2006-11-10 11:06 PM 編輯 ]

FreedomJustice

concept Test 27(1996)
Which of the following can improve the accuracy of the experiment
(1)Covering the beaker with a lid
(2)Completely immersing the heating coil in liquid
(3)Stirring the liquid throughout the experiment
A(1)only
B(2)only
C(1)&(3)only
D(2)&(3)only

[ 本帖最後由 鍾倩怡 於 2006-11-10 11:05 PM 編輯 ]

FreedomJustice

No ans me

鍾倩怡

我讀文科 所以唔知

~樂~

哥哥仔
你條題目係唔係未打哂上黎呀
都唔知你果個係咩experiment

FreedomJustice

No
I have already打哂出來
is the test for F.5
that 試題only have25% corr(1996)
the ans is B
1)Covering the beaker with a lid
is wrong because sometimes we will test Gas
3)Stirring the liquid throughout the experiment
also wrong we can't also do that so of the liquid we can't Stirring

haha
no corr wor

F.5 lv

FreedomJustice

(the yaer of 會考)1984
An equal quantity of heat is supplied to each of the following substances and the corresponding rise in the tempature
are recorded.
whuch of the following substances has the samllest specific heat capacity
Substance         Mass(kg)            Rise in temperature
A                       2                         5
B                       2.5                      5
C                       3                         4
D                       5                         3







the ans is D

~風~

請post 呢個出黎做乜

FreedomJustice

A body can have a zero velocity but also be accelerated.
Qus:This event will happen in which point.
Why
A.Highest point
B:lowest point
C.middle point

lenad

Is the answer B ?

二五仔

引用:

原帖由 FreedomJustice 於 2006-12-7 09:48 PM 發表
A body can have a zero velocity but also be accelerated.
Qus:This event will happen in which point.
Why
A.Highest point
B:lowest point
C.middle point

force好似係form6嫁wor=.="

FreedomJustice

No wor
I am learning

return_hk

the answer is a
that is highest point

conqueror

I think the answer is A,right?

野孩子

Of course is A