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一、(20分)本题有10个小题,题中每一个空格1分,把答案写在题中横线上空白处,不要求写出演算过程.1.光的干涉、衍射证明光具有_性,光电效应证明光具有_性,所以光具有波粒二象性.2.钍衰变成镤的核反应方程是:丹叮h、软PS+ie,上述核反应叫做_衰变,产生的新核外Pa中有一个中子.3.如图1所示,A、B为同一轮子上的两点,0为转轴,OA=30cm,/nOB=10cm,当轮旋转时A、B两点I”._1的线速度之比υ_A:υ_B=_,角/速度之比(?)_A:(?)_B=_.灵气回厂多歹4·我国生产的家用电器铭牌上 图 1标有“额定交流电压220V,额定频率50Hz”.这里220V指的是交流电压的_值,这种交流电的周期为_S.
I. (20 points) There are 10 questions in this question. Each space in the question is 1 point. Write the answer in the space on the horizontal line of the question. No calculation process is required. 1. Interference of light, diffraction proof light _ Sex, photoelectric effect proves that light has _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. There is a neutron in the nuclear Pa. 3. As shown in Figure 1, A, B are two points on the same wheel, 0 is the axis, OA = 30cm, /nOB = 10cm, when the wheel rotates A, B: The ratio of the linear velocity of two points I“._1 to υ_A: υ_B=_, the ratio of angle /speed (?)_A:(?)_B=_. Figure 1 above marked ”rated AC voltage 220V, rated frequency 50Hz". Here 220V refers to the AC voltage _ value, this AC cycle is _S.