樓主點睇ust嘅physics
你個名囉
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樓主點睇ust嘅physics
你個名囉
樓主點睇ust嘅physics
有d機會上過下UST的physics course,大約到year 2 sem 1左右的level
課程還好,但講成個校園既風氣會CU比較好,果邊physics d人真係天外有天
how does the nuclear reactor get the neutrons and accelerate them?
點解低流速會高壓 同埋相反
點解流線型會流得順啲?
唔該 以前dse 無學過
how does the nuclear reactor get the neutrons and accelerate them?
核燃料本身自己會放出中子.
佢地唔會加速中子,反而要用deteurium water黎減速,如果唔係會大爆炸/冇反應
how does the nuclear reactor get the neutrons and accelerate them?
there are several types of sources
1. source from spontaneous decay/fission
2. bombarding accelerated atoms to another atom (e.g. plutonium to beryllium)
3. neutron activation
4. chain reaction
acceleration can be done by thermal or DT/DD fusion to generate high energy neutron
how does the nuclear reactor get the neutrons and accelerate them?
核燃料本身自己會放出中子.
佢地唔會加速中子,反而要用deteurium water黎減速,如果唔係會大爆炸/冇反應
講多少少,Pressurised Heavy Water Reactor先用Deuterium (Heavy Water) 去moderate to thermal spectrum...
其他PWR,BWR會用normal water去moderate但嗰enrichment就會大多Heavy Water Reactor少少
(3-5% Vs 0.7%)
而fast reactor就唔洗做moderation,只係要coolant...
點解低流速會高壓 同埋相反
點解流線型會流得順啲?
唔該 以前dse 無學過
navier stoke/bernoulli equation個解來
streamline係因為一d boundary dragging同turbulence的問題所以"流線型"會順d
因為我都係物理系同路人,見樓主你讀到上pg仲搵到工所以有幾樣想問![]()
1. 問d background嘢先,你undergrad嘅時候CGPA幾多?
2. 利申番先,我自己就掛住玩唔讀書,所以由一開始滿腔熱誠到依家淪為學渣。但我真係深深體會到物理依科真係唔係普通人讀得店。可能如果我當初比多d時間讀書唔洗墊底,但講緊gpa上3.3 or above真係冇天分係做唔到。大家讀過物理都明,好多時d問題有d位係靠天分突然叮一聲諗到個key point之後就解答到。想問下樓主對於「讀物理讀得好一定要靠天分」有咩睇法?
3. 見樓主好似有讀medical physics嘅嘢?唔知你點睇medical phy對將來搵工有冇幫助?前景如何?
Sor打得有d長 希望樓主會答 thx a lot!!![]()
7 years means:
Dse 3 years
Bachelor 4 years
HKCEE + HKALE 4 years + Bachelor 3 years
al讀4年
點解低流速會高壓 同埋相反
點解流線型會流得順啲?
唔該 以前dse 無學過
navier stoke/bernoulli equation個解來
streamline係因為一d boundary dragging同turbulence的問題所以"流線型"會順d
sorry 第一個可唔可以詳細少少![]()
關唔關平時啲氣由高壓區去低壓區事
想問下地球表面嘅curvature tensor係點計/度出嚟?
巴打點睇香港做computer vision![]()