论文部分内容阅读
一、单项选择题(本题共6小题,每小题3分,共18分.每小题只有一个选项符合题意.)1.从下列哪一组物理量可以算出氧气的摩尔质量()A.氧气的密度和阿伏加德罗常数B.氧气分子的体积和阿伏加德罗常数C.氧气分子的质量和阿伏加德罗常数D.氧气分子的体积和氧气分子的质量2.质子(p)和α粒子以相同的速率在同一匀强磁场中做匀速圆周运动,轨道半径分别为 R_p和 R_α,周期分别为 T_p和 L_α,则下列选项正确的是()A.R_p∶R_α=1∶2,T_p∶T_α=1∶2B.R_p∶R_α=1∶1,T_p∶T_α=1∶1C.R_p∶R_α=1:1,T_p∶T_α=1∶2D.R_p∶R_α=1∶2,T_p∶T_α=1∶1
A single choice of questions (a total of 6 questions, each small question 3 points, a total of 18. Each question only one option in line with the problem.) 1 from which of the following physical quantities can calculate the molar mass of oxygen () A Oxygen density and Avogadro’s constant B. Oxygen molecular volume and Avogadro’s constant C. Oxygen molecular mass and Avogadro’s constant D. Oxygen molecular volume and oxygen molecular mass 2. The proton (p) and the α particles do uniform circular motion in the same uniform magnetic field at the same velocity, the orbital radii are R_p and R_α respectively, and the periods are T_p and L_α respectively. Then the following options are correct: () A.R_p:R_α = 1: 2, T_p: T_α = 1: 2B.R_p:R_α = 1: 1, T_p: T_α = 1: 1C.R_p:R_α = 1: 1, T_p: T_α = 1: : 2, T_p: T_α = 1: 1