[2022] DSE 物理科Physics討論區

今年仲易過上年我覺得未必攞到

應該過半機會唔比分除非今年Marking Scheme 真係好鬆

aluminum邊係降低radiation
control set up嘅速度喺中間
CupY, CupZ一個一定跌落快啲一個一定跌慢啲
唔會兩個都reduce heat loss

所以我就寫aluminum loss faster, because aluminum promote heat loss by infrared radiation

2a ii 個N會唔會有唔同， Number of particle = mol x Na 。B既mass細過A mol咪變左

3c iii should be 27.3 deg?

F= mg sin θ For using F= 6.21N.

唔一定正確

A straight line 係咪 cut through Y=0.5 and X =20

係啊 part c樓上岩

PV= nRT where n = N/ Na then

我見佢俾埋N Na mass， 自然就諗 我打出黎嗰樣野

n N Na 邊一個關mass/molar mass事

可能我錯？

係喎 睇錯數

tanθ = Fc/mg

如果無估錯 我覺得你似誤解左Na

R sin = Fc
R cos = mg
Tan = Fc/mg

nRT is constant as temperature is the same
So in two cases both have the same number of particles

The question does NOT mention the gas has different mass but you should know it.

I guess he/she misleads by the mass of two gases are the same
So mass /molar mass give different mole and hence different N

睇嚟真係我誤會咗啲嘢

有冇Mc 卷

全中似係

可唔可以講多少少
佢哋R唔一樣
T一樣 w一樣
點解Rw^2 唔係一樣