大学物理双语试卷B.docVIP

广东工业大学考试试卷 ( B )课程名称: 大学物理一 考试时间: 第21周星期三 ( 7月12日)题号一二三四五六七八九十总分得分评分人1. Multiple Choices(选择题，每个题目3分，共30分。只有一个正确答案。)1）parallel 平行； perpendicular 垂直2) bar 棒3)学 院： 专 业： 学 号： 姓 名： 装 订 线 4) transverse wave 横波， respectively 分别的5) in phase 同相； destructive interference 相干相消6) increase 增加7) incident 入射；construtive interference相干相长8) diffraction grating 衍射光栅9) relativistic相对论的10) proton 质子2. Complete Blanks.(填空题，每个题目3分，共30分。)1). A meson with a lifetime of exactly is created in the atmosphere and travels vertically downward at 99.9% of the speed of light. The meson decays on reaching sea level. The lifetime of the meson measured by an observer attached to the earth is _, and the height at which the meson was created is _ .2) The Brewster angle for producing a plane polarized beam of light by reflection from a lake is 53.1。, the refraction angle is_.3）yxThe figure shows an overhead view (俯视) of a ball with mass m boundcing from a vertical wall without any change in its speed v. Consider the change in the balls impulse， _, the direction of is _. 4）The position of a particular particle as a function of time is given by . The particles acceleration as a function of time is _.5) w1w 2A man stands on a freely rotating platform. With his arms extended, his rotation frequency is 0.25rev/s. But when he draws in, his frequency is 0.80rev/s. The ratio of his moment of inertia in the first case to that in the second () is _.6) The equation of a loudspeaker vibrates in SHM is , the maximum velocity is _, and the maximum acceleration is _.7）If 750 fringes of 589-nm light are to pass by a reference line, the mirror M1 in a Michelson interferometer (干涉仪) must be moved _nm.3. Solving Problems. (计算题，每题10分，共40分)1）Two blocks are connected by a light string passing over a pulley of radius 0.25m and moment of inertia I. The blocks move (towards the right) with an acceleration of 1.00m/s2 along their frictionless inclines (斜面).(a) Draw free-body diagrams for each of the two blocks and the pulley. (b) Determine FT1 and FT2 , the tensions in the two parts of the string. (c) Find the net torque acting on the pulley, and determine its moment of inertia I. 2）For polarizers are placed in succession (连续) with their axes vertical, at 30。to the vertical, at 60。to the vertical, and at 90。to the vertical. (a) Calculate what fraction of the incident unplolarized light is transmitted by the four polarizers. (b) Can the transmitted light be decreased by removing one of the polarizers? If so, which one? (c) Can the transmitted light intensity be extinguished by removing one of the polarizers? If so, which one(s)?3) A person pulls on the spring, stretching it 3.0cm, which requires a maximum force of 75N. (a) How much work does the person do? (b) If, instead, the person compresses the spring 3.0cm, how much work does the