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• 2. A pendulum of length L has its motion interrupted by a peg vertically beneath the support at a di
• 3. A rocket is fired vertically with half the \"escape speed\". (Ignore the earth's
• 4. How can a skydiver achieve a smaller \"terminal speed\"?(A) Reducing the effective cr
• 5. What is not correct for a \"conservative force\"?(A) It can always be associated with
• 6. Which is correct for a downhill race among a loop, a cylinder, and a solid sphere (all with the s
• 7. A block of density ρBhas a horizontal cross-sectional area A and a vertical height h. It floats i
• 8. Two sound waves differ in their intensity levels by 20 dB. What is the ratio of their displacemen
• 9. A cylindrical tank of height H is open at the top and has a diameter of D. It is filled with wate
• 10. A traveling wave on a string of linear density μ can be described by the wave function y(x, t) =
• 11. A monatomic gas undergoes the set of thermodynamic processes shown in Fig. 2. There are n mol of
• 12. A non-conducting sphere of radius R has a total charge Q spread uniformly throughout its volume.
• 13. When a ductile metal wire is stretched to N times its original length (without changing its dens
• 14. Which phenomenon can be analyzed by the mathematical tool of \"phasor\"? (A) ac circ
• 15. A capacitor of capacitance Ci is charged to a potential difference V. The terminals of the charg
• 16. The potential difference across the terminals of a battery is V1when there is a current of I1 in
• 17. Adc motor with its rotor and field coils connected in series has an internal resistance of R. Wh
• 18. A slender metal rod of length L rotates with an angular speed of ω about an axis through one en
• 19. Which is not an appropriate pair of analogy between mechanical and electrical quantities of the
• 20. An electromagnetic wave has an electric field given by E(y,t) = E0 k cos(ky -ωt). Which statemen
• 21. Which is necessary for two sources of waves to be \"coherent\"?(A) They are \"
• 22. The image of a real object produced by a convex mirror is (A) virtual； (B) erect； (C) reduced； (
• 23. Which quantity of the electron in a hydrogen atom is a constant multiplied by an integer in Bohr
• 24. An electron is accelerated by a voltage from rest until the wavelength of its matter wave is λ.W
• 25. Which behavior in the \"photoelectric effect\" can also be explained by the wave the
• 3.壓克力筆的製造材質，下列何者為非？(A)動物毛比較稀有(B)動物毛比較耐用(C)動物毛比較容易積汙變硬(D)化學合成毛不適合 。