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106年 - 新北市立柑園國民中學106學年度第二學期第一次定期成績評量七年級 數學(範圍：1-1 ～ 2-1 )#75195
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cy940756
B2 · 2021/11/24
#5227963
(共 294 字，隱藏中）
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B3 · 2025/11/25
#7152328
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私人筆記 (共 1 筆)
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2020/04/02
私人筆記#3939378
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-2x-6y=-12-8x-4y-1...
(共 79 字，隱藏中）
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相關試題
1. Two boxes are connected by a string, as shown below. The string and pulley are massless, and m1+m2=16 kg. If the system is at rest and the coefficient of static friction is 0.6, what is the minimum weight of m1? (A) 4 kg (B) 6 kg (C) 8 kg (D) 10 kg (E) 12 kg
#1970670
2. A 70 kg person stands on one end of a one-meter long board. The board is uniform and weighs 100 kg. How far is the center of mass of the system “person on board” from the person?(A)0.1m(B)0.3 m (C) 0.5 m (D) 0.8 m (E) 0.9 m
#1970671
3. A thin uniform rod of mass M and length L is positioned vertically above an anchored frictionless pivot point, as shown below, and then allowed to fall to the ground. At what speed does the free end of the rod strike the ground? (A) (B)(C)(D)(E)
#1970672
4. A disk with a radius of 2.0 m and a rotational inertia of 0.40 kg·m 2 rotates with an angular speed of 4.0 rad/s around a frictionless vertical axle. A wade of clay (m = 25 g) drops onto and sticks to the edge of the disk. What is the new angular speed of the disk? (A) 3.2 rad/s (B) 3.6 rad/s (C) 2.7 rad/s (D) 1.1 rad/s (E) 0.67 rad/s
#1970673
5. A violin is played with an initial intensitywhat is the difference in sound intensity level (dB) between these two extremes? (A) 10(log5) (B) 5 (C) 10 (D) 10(log2) (E) 2(log5)
#1970674
6. An engine is designed to obtain energy from the temperature gradient of the ocean. What is the thermodynamic efficiency of such an engine if the temperature of the surface of the water is 15 °C and the temperature below the surface is 5 °C? (A) 96% (B) 67% (C) 31% (D) 17% (E) 3.5%
#1970675
7. If 10 kg of ice at 0 oC is mixed with 100 kg of water at 80 oC and is additionally heated with 4620 kJ, what is the final temperature of the water? (The heat capacity constant of water is 4.2 kJ∙kg-1 ∙K -1 , and the latent heat of fusion of water is 333 kJ∙kg-1 .) (A) 45 oC (B) 55 oC (C) 65 oC (D) 70 oC (E) 75 oC
#1970676
8. Some species of whales can dive to the depth of one kilometer. What is the approximate total pressure they experience at this depth? (ρsea = 1020 kg/m3 and 1 atm =1.01 ×105 N/m2 ) (A) 9.00 atm (B) 90.0 atm (C) 100 atm (D) 111 atm (E) 130 atm
#1970677
9. A proton moves around a circular path (radius = 2.0 mm) in a uniform 0.25 T magnetic field. What total distance does this proton travel during a 1.0 s time interval? (mp = 1.67×10-27 kg, q = 1.6× 10-19 C) (A) 82 km (B) 59 km (C) 71 km (D) 48 km (E) 7.5 km
#1970678
10. A current loop freely rotates in a uniform magnetic field (B = 0.50 T). The maximum torque on the loop is 0.60 N ∙ m. What is the magnetic dipole moment of the loop? (A) 1.2 A·m 2 (B) 2.4 A·m 2 (C) 0.60 A·m 2 (D) 0.30 A·m 2 (E) 0.83 A·m 2
#1970679
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