工程與科技 大學 5個月以前 請問有人會算這題嗎 二、退火處理的低碳鋼鋼板厚度為3mm, 現在利用沖壓模具剪斷一甜甜圈形狀外徑為 15mm,內徑為 5mm 的料件,若荷重-伸長 量圖形如表2所示,請求出低碳鋼鋼板的剪 力強度。 荷重(kg) | 伸長量(mm) 400 800 1200 1600 2000 2400 2800 3200 3600 4000 3800 3000 2800 0.05 0.10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.50 0.52 0.525 0.53(斷裂) 待回答 回答數: 0
自然科學 大學 7個月以前 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 7個月以前 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
數學與統計 大學 8個月以前 想問第42題 25. lim 8118 27. lim X18 A 29. lim 31. lim 33. lim √x - √√x x→→∞ √√√x + √√x 35. lim 2x²/3 - x1/3 + 7 xxx x8/5 + 3x + √x 37. lim x→∞ x + 1 39. lim x - 3 x→∞ √4x² + 25 1 x→0+ 3x 1-x² 2√x + x¹ 3x - 7 41. lim 1. 2 X-2 X- 43. lim √x² + 1 45. a. lim 3 2x x-8+ x + 8 + 7x 4 x→7 (x-7)² 2 2 46. a. lim x-0+ x1/5 4 2 x-0+ 3x¹/3 B Infinite Limits Find the limits in Exercises 37-48. Write ∞ or -∞ where appropriate. 5 x →0-2x x - 3x 26. lim√√³+x-2 b. lim 2 + √x x→∞ 2 - √x 28. lim 30. lim x¹ + x4 x-xxx-²-x-3 32. lim Vì - 5x + 3 x-∞ 2x + x2/3 - 4 34. lim 36. lim 2 x→0 3x¹/3 xxx +1 2 b. lim x→0 x1/5 4 - 3x3 x-∞ √6 +9 38. lim 40. lim √x² + 1 42. lim x-3x - 3 3x x-5-2x + 10 44. lim -1 x→0 x²(x + 1) 19 lime 1 待回答 回答數: 0
工程與科技 大學 10個月以前 第一張是題目,第二張是答案,請大家看一下我哪裡寫錯了,一直跟答案對不上,如果有人知道如何解,請讓我知道如何求得答案,謝謝 1.1 模擬測驗 環境化學 Environmental Chemistry 9克的純硫酸(H2SO4)加水至0.5升,試求此硫酸溶液的重量百分濃度?體積莫 9x10² 耳濃度?含多少ppm?當量濃度? 0.5 500 待回答 回答數: 0
工程與科技 大學 10個月以前 求救 The shaft shown in the figure is machined from AISI 1040 CD steel. The shaft rotates at 1600 rpm and is supported in rolling bearings at A and B. The applied forces are Fi 10 kN and F2 = 4 kN. Determine the minimum fatigue factor of safety based on achieving infinite life. If infinite life is not predicted, estimate the number of cycles to failure. Also check for yielding. 30 mm- A 192 mm 40 mm 12 mm 240 mm 192 mm -45 mm F₂ 240 mm All fillets 1.5 mm R. 192 mm 42 mm 72 mm 12 mm B 30 mm 待回答 回答數: 0
工程與科技 大學 11個月以前 想問這兩個式子怎麼知道什麼時候用加的什麼時候用減的啊? Sidizzo son ei ji povaworl grey line tolera L apapagoslingeri 14.0 V gool sign S qisning nanalintuniendizzo 00 6.00 (+ 21.21. Snus sur le mure on Roomet while keeping it electrically the 4.0 2 es or parallel combinations of 918 b + a oissant 10.0 V sociated with combining resis-mollastunquodh (a) emoved and replaced by a wire qoo circuit.) Because the circuit is his problem is one in which we → I www 6.02 100 9.00 (2 18.00 bus M 2.0 2 abcda: (2) 10.0 V – (6.0 N) Į — (2.0 ₪) I₂ = 0 befcb: - (4.0 N) I2 − 14.0 V + (6.0 M) — 10.0 V = 0 - 1₂ Figure 21.21 (Example 21.4) led in branches. moq as labeled in Figure 21.21.mais12A circuit containing different i svig 19 d od oni bi u bliud tot lo mo battib 210109 26919rw 1+ en slin es (1) 1₁ + 1₂2-1₂ = 01S sugit ni nobı aldı YOU ARE C 15usdwes (2.02) 4₂2 01 Toyons de = L d (3) -24.0 V + (6.0 N) - (4.0 N)₂ = 0lvom snigul grans di anioq gnilise or of am gids de stod bad i mi smo duo d Monosh 10.0 V (6.02), − (2.0 N) (1,₁ + 1₂) = 0 Tom Tom (4) 10.0 V - (8.02) 4₁ 10 0 sob 待回答 回答數: 0
工程與科技 大學 約1年以前 有人會這些東西嗎🥹感謝 3. 如下圖為一四連桿機構,Q2Q4為固定桿,Q2A 線段為輸入桿,設反時針方向之角速度 為100 rpm, Q.B線段長40cm,試用圖解法求A、B及C三點之速度大小(C為QB之中點), 繪圖比例1cm=10cm。 9₂ B A 60° 55⁰ 75 cm 460⁰ A, B 30 cm C 40cm La Wi=1nonyienc 4. 向量 長 25 公分,向量長 50 公分,二者之間夾60°,求Aa➔BD線段大小及方向。 25 Aa Bb E 54334 2 尚未解決 回答數: 2