問題詳情
五、在核子反應爐中，使用 2 × 1014個中子 /（平方公分‧秒）之通量，持續撞擊 10 g 之235U 共 10 天。請計算由 235U 核分裂反應所產生 99Mo（t1/2 = 66 hr）的放射活性為何？（已知此核反應之截面為 10–26cm2）。（8 分）
參考答案
答案：C
難度：困難0.350877
統計：A(7),B(7),C(60),D(86),E(0)
內容推薦
- The show ______ many brilliant ballet dancers performing together. You’ll regret if you miss
- (A) In other words (B) Yet (C) All in all (D) As a result
- (A) Finally (B) At the end (C) At last (D) In the end (Choose the WRONG one)
- The job doesn’t pay very well but at least we won’t _____!
- 八、將 15 克的金放在中子通量密度為 5×1012cm-2s-1的原子爐裡加以活化，試計算其飽和活性為何？（5 分）並請決定 4 天後的活性，以及在 4 天內有多少%之金原子被活化？（已知金之核反應
- 一、試比較水懸劑、可溶濃縮劑與乳劑三種農藥劑型之不同與使用方式？（20 分）
- Lin Hwai-min, the founder of Cloud Gate Dance Theatre of Taiwan, is famous for his dance 41 is highl
- (A) look (B like (C) look as (D) look like
- 四、在迴旋加速器中，用電流通量為 1μA/cm2 的質子射束撞擊 1 g 的 111Cd 達 10 小時之久。試計算所產生的 111In 放射活性為何？已知 111In 之半衰期為 8 天，且此（
- The man didn’t commit the crime. He was ______.
內容推薦
- (A) of (B) for (C) to (D) as
- The necklace is my most _____ possession because it was given by my grandmother.
- ⑵從射束轉移出去的能量？
- 六、⑴能量為 100keV 的光子束發生康普吞碰撞，試求（已知 100keV 的光子平均能量轉移為 8%）。（每小題 2 分，共 6 分）(a)散射輻射的最低能量，
- 夫妻兩人經血液凝集試驗，得知下表結果（＋代表血液凝集，－代表血液沒有凝集）。若他們的長子為B型，則第二個孩子為A型或AB型的機會各為多少？ (A) 1 2 (B) 1 2 、0 (C)
- IV. Cloze (每題 1 分，共 15 分)A poem can 36 us with the thoughts it shows. For example, in Richard Armour
- ⑶轉換成帶電粒子動能的能量？
- (b)反跳電子所獲得的最大能量，
- (A) as (B) in (C) to (D) with
- . (A) taking (B) seeing (C) making (D) picking
- ⑷在能量平衡下，所產生的散射能量？
- (A) at (B) in (C) by (D) to
- . (A) to (B) about (C) for (D) on
- Underneath the Paris Opera House __46__ a lonely phantom whose face was horrible and ugly, so he wor
- What is true about Jeannie?(A) Jeannie can act.(B) Jeannie can get cashiers’ money and put i
- 40 如圖所示 RLC 並聯電路，若 R = 10 (Ω)、XL=10 (Ω)、XC=5 (Ω)，則此電路之電壓 E 與電流 I 之相位關係應為： (A)電壓超前電流 (B)電流超前電壓 (
- In CCI, how old is a dog when it is teamed with an applicant?(A) About 2 years old.(B) About
- Stinky tofu is u_____e to Taiwan. No other countries have food just like it.
- 再也沒有比這老婦人這突如其來的改變更令人覺得神奇的事了。(A) Nothing was more miraculous than the sudden change in the wo
- ⑵在動力螺桿（power screw）中，『鋸齒螺紋』的特性為何？（6 分）
- Which of the following is closest in meaning to the word “whelp”?(A) To teach.(B) To give bi
- Against all our _____ (expect), George was promoted to manager. It never occurred to us that
- 她不是被他的臉而是被他邪惡的心嚇壞了。(A) She was horrified not by his face but by his evil heart.(B) She was h
- Millions of students have b ted from the new educational project, through which they
- Which of the following statements is true?(A) Polio is a disease that mainly affects people&