計到負數就知係decsending
2021 dse 物理科 physics 綜合討論區
君夫人陽貨欲
522 回覆
6 Like
5 Dislike
你唔sure其實可以直頭計返果個位嘅vertical velocity double check
計到負數就知係decsending
計到負數就知係decsending
畫一條對稱既parabola 佢個最高點應該係斬開條parabola兩份
但係依家條trajectory唔係對稱 因為有一邊跌到低過原本個ball既高度
畫得誇張啲就係咁
但係依家條trajectory唔係對稱 因為有一邊跌到低過原本個ball既高度
畫得誇張啲就係咁
E2
CADBCADB
a. According to classical EM theory, the atom would be unstable (or finally collapse) as the orbiting electron would continuously emit EM wave so the atom is continuously losing energy.
bi) C
bii) 434nm-> violet
biii) the photon is absorbed, the electron escapes to infinity, the atom is ionised
biv) transitions from n= 4 to n=2 and from n = 3 to n=2 should mark with “V”
From n=4 to n=3; from n=4 to n=2; from n= 4 to n = 1; from n=3 to n=2; from n= 3 to n=1; from n = 2 to n= 1
Total 6 transitions
CADBCADB
a. According to classical EM theory, the atom would be unstable (or finally collapse) as the orbiting electron would continuously emit EM wave so the atom is continuously losing energy.
bi) C
bii) 434nm-> violet
biii) the photon is absorbed, the electron escapes to infinity, the atom is ionised
biv) transitions from n= 4 to n=2 and from n = 3 to n=2 should mark with “V”
From n=4 to n=3; from n=4 to n=2; from n= 4 to n = 1; from n=3 to n=2; from n= 3 to n=1; from n = 2 to n= 1
Total 6 transitions
最後嗰條納米就由佢啦
我都冇唸過佢會出得咁細
我都冇唸過佢會出得咁細我答2
E3哩啲屎忽嘢真係唔知佢想點
應該係Mode 2？
停車停得太密個effectiveness係會低，但係你高速公路又好少停車
應該係Mode 2？
停車停得太密個effectiveness係會低，但係你高速公路又好少停車
今年E2淺得誇張 
年年都係咁... 你覺得邊年特別難？
點啊私補哥哥？我當你shunt嗰個位唔洗識，但都讀好啲Syllabus嘅point先出嚟教啦
我唔知你點樣喺批頭同垃圾到arrive到EQ低嘅結論
願聞其詳
願聞其詳
燃料少咗 火箭輕咗
dp/dt unchanged F unchanged M decrease a自然大咗
不過考嗰陣寫咗g decrease a increase
dp/dt unchanged F unchanged M decrease a自然大咗
不過考嗰陣寫咗g decrease a increase
冇記錯佢個燃料mass/time係冇變 所以change in momentum一樣 向上嘅力理應不變
可摸耳up E12嚟睇吓
我答咗Mode 3
唔知啱唔啱 因為keep住均速行進都會charge到RBS
而1 2只有係Break嘅時候charge到
唔知啱唔啱 因為keep住均速行進都會charge到RBS
而1 2只有係Break嘅時候charge到
我覺得關 frequency of breaking 同speed of car 有關
E2上面有
E1 brief and
BBCCADAD
ai) s= r (theta)
aii) 開兩條式除開佢就出到答案
b)i) monitor Doppler shift of spectral lines of spectrum of star X
Difference in positive and negative values is because the universe is expanding
bii) position D & Sgr A* is at position 2
c)代escape velocity = c就做完
E1 brief and
BBCCADAD
ai) s= r (theta)
aii) 開兩條式除開佢就出到答案
b)i) monitor Doppler shift of spectral lines of spectrum of star X
Difference in positive and negative values is because the universe is expanding
bii) position D & Sgr A* is at position 2
c)代escape velocity = c就做完
已經太複雜了，而家啲中學生邊到識計咁多數...
求賜教
Q3係D😂
You are right!
You are right!
甘拜下風
rock同human一定有（textbook都有寫）
Sea water乜都可以有，淨係d minerals都好多係ionizing
所以D
Sea water乜都可以有，淨係d minerals都好多係ionizing
所以D
請問有冇ching可以跌份paper2出嚟
好好奇你係用咩app 寫
我用onenote 佢冇分開到頁數
我用onenote 佢冇分開到頁數