自然科學 大學 1年以上以前 求解🙏 35) A patient receives 10 mrads of gamma radiation. If the factor that adjusts for biological damage for for gamma radiation is 1, how many mrems did the patient receive? A) 2 mrem B) 5 mrem C) 10 mrem D) 20 mrem E) 200 mrem Answer: C Objective: 5.3 Global Outcomes: GO4 待回答 回答數: 0
自然科學 大學 1年以上以前 求解🙏謝謝~ 34) A patient receives 4.2 × 103 mrads of iodine-131, which emits ß-particles. If the factor that adjusts for biological damage is 1 for beta particles, how many rems did the patient receive? A) 4.0 B) 0.40 C) 0.30 D) 2.0 E) 40. Answer: A Objective: 5.3 Global Outcomes: GO4 待回答 回答數: 0
自然科學 大學 1年以上以前 這是關於島嶼生物地理學的題目,求解 13.某政府設立了四個生態保護區,分別為甲、乙、丙、丁四種不同的設立方 式,如下圖中黑色區域,且四種方案中黑色區域的總面積皆相等,地形氣候等 環境條件相似,試回答下列問題。 保護區。 甲。 Ze 一大區。 兩鄰近中區。 三鄰近小區。 ← 設立方區。 (1)根據所學,哪一個保護區是最好的設計方式?為什麼?(6分) (2)呈上題,該政府打算以最低成本改善生態保護區「戊」如下圖, # J Je 一長區 10 試以圖示展現該如何調整?並簡單說明原因。(4分) 。 待回答 回答數: 0
自然科學 大學 1年以上以前 這題很難理解 Potential energy (MeV) a. 3 fm. b. 4 fm. 1 2 3 FIGURE 7.24 Potential energy for two deuterons (Passage Problems 70-73) (MeV), a unit commonly used in nuclear physics, and the separation is 10-¹5 m). c. -3 MeV. d. 0.3 MeV. 5 in femtometers (1 fm 劉 70 The force between the deuterons is zero at approximately 10 Separation (fm) c. 3.3 MeV. d. 3.6 MeV. = c. 5 fm. d. the force is never zero. 71. In order for initially two widely separated deuterons to get close enough to fuse, their kinetic energy must be about a. 0.1 MeV. b. 3 MeV. 72. The energy available in fusion is the energy difference between that of widely separated deuterons and the bound deutrons after they've "fallen" into the deep potential well shown in the figure. That energy is about a. 0.3 MeV. b. 1 MeV. 73 When two deuterons are 4 fm apart, the force acting on them a. is repulsive. b. is attractive. c. is zero. d. can't be determined from the graph. 待回答 回答數: 0
自然科學 大學 1年以上以前 大一普化求救ಥ_ಥ 3.49 x 10-7 m h²h² 5-h E = 8m²z 8mL² 2 Q: What is the total probability of finding a particle in a one-dimensional box in level n = 4 between x= 1/4L and x = 5/8 L he K 待回答 回答數: 0
自然科學 大學 1年以上以前 答案如圖 9.47 A frictionless pulley has the shape of a uniform solid disk of mass 2.90 kg and radius 10.0 cm. A 1.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig. E9.47), and the system is released from rest. (a) How far must the stone fall so that the pulley has 3.30 J of kinetic energy? (b) What percent of the total kinetic energy does the pulley have? 01442m 47.6% Figure E9.47 T M mg 10 A 116 1.50 kg stone 2.9 2.50 kg pulley 待回答 回答數: 0
自然科學 大學 1年以上以前 答案如圖 9.47 A frictionless pulley has the shape of a uniform solid disk of mass 2.90 kg and radius 10.0 cm. A 1.60 kg stone is attached to a very light wire that is wrapped around the rim of the pulley (Fig. E9.47), and the system is released from rest. (a) How far must the stone fall so that the pulley has 3.30 J of kinetic energy? (b) What percent of the total kinetic energy does the pulley have? 01442m 47.6% Figure E9.47 T M mg 10 A 116 1.50 kg stone 2.9 2.50 kg pulley 待回答 回答數: 0
自然科學 大學 約2年以前 想請問這題是如何解出來的? 手寫的圖是我嘗試解的過程,但沒有解出答案,麻煩大家了🫠 21. A metal ion in a weak-field octahedral complex has two more unpaired electrons than the same ion does in a strong-field octahedral complex. Which of the following could the metal ion be? (A) Cr³+ (B)Mn²+ (C)Co²+ (D)Ti²+ (E)Cu²+ 待回答 回答數: 0
自然科學 大學 約2年以前 請問Mass光譜切割到最後 剩下的基團怎麼寫? 切下乙烯、C=O後 剩下的基團要怎麼標示? 分子量剩下55,是C3H5N 這是什麼基團或是結構嗎? Relative Intensity 100 80 40 MS2008-03710CW 0 mm 83 20間距相差55m/Hz,可知可能為 111m/z出現訊號,可推 測分子量可能為111 111 間距相差28m/Hz,可知可能為-CH=CH(乙烯基) 55間距相差28m/Hz,可知可能為C-0 50 v/tbn/pyntyy.................... 100 150 m/z 200 250 28 28 55 NH2 待回答 回答數: 0