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108年 - 2019彰化縣縣立大同國中七年級108 上學期公民第一次段考(期中考)康軒#87236
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A(0), B(2), C(10), D(0), E(0) #2356575
詳解 (共 1 筆)
胡教授加博士先生
B1 · 2025/08/21
#6618050
題目描述的是 各機關單位應設立性騷擾申...
(共 218 字,隱藏中)
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#2356576
1. Consider the block and spring system shown in the drawing. On the earth’s surface the natural frequency is ω. The system is then transported into moon’s surface (Gravitational acceleration: gMoon = gEarth/6). How will the natural frequency of the system change? (A) 6ω (B) ω (C) ω/6 (D) ω/(E) The frequency doesn’t change.
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2. What is this body’s moment of inertia I about axis through disk A? (A) 1.8 kg · m (B) 1.8 kg · m2 (C) 4.0 kg · m (D) 4.0 kg · m2 (E) 5.0 kg ·m2
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3. The figure shows a plot of the time-dependent force acting on a particle in motion along the x-axis. What is the total impulse delivered to the particle? (A) 0 kg · m/s (B) 1 kg · m/s (C) 2 kg · m/s (D) 3 kg · m/s (E) 4 kg · m/s
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4. A block of mass m sliding down an incline at constant speed is initially at a height h above the ground, as shown in the figure. The coefficient of kinetic friction between the mass and the incline is μ.If the mass continues to slide down the incline at a constant speed, how much energy is dissipated by friction by the time the mass reaches the bottom of the incline? (A) mgh/µ (B) mgh (C) µmgh/ sin θ (D) mgh sin θ (E) 0
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5. A baseball is thrown vertically upward and feels no air resistance. As it is rising (A) both its momentum and its mechanical energy are conserved. (B) both its momentum and its kinetic energy are conserved. (C) its kinetic energy is conserved, but its momentum is not conserved. (D) its momentum is not conserved, but its mechanical energy is conserved. (E) its gravitational potential energy is not conserved, buts its momentum is conserved.
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