200分求一道物理题 求懂英文高手解答Suppose that we have 39936 atoms of a radioactive substance with a half-life of 3 hours. a. How many atoms of that element remain after 15 hours?Answer= 多少atomsb. How many atoms remain after 21

来源:学生作业帮助网 编辑:作业帮 时间:2024/10/04 00:23:37
xRN@mh_0x M[$^* (A9x.Q13-OD/ykff -ӌLu};? x˧t#9*S{,Y  ؘ4&hQ@`-5DĴ:!X2k()Qܛ@I- q>([p DZjHQE-l0Lf;w4y". |9
求高手解答一道物理题要有公式和必要文字说明 问一道物理题,求高手 200分求一道物理题 求懂英文高手解答Suppose that we have 39936 atoms of a radioactive substance with a half-life of 3 hours. a. How many atoms of that element remain after 15 hours?Answer= 多少atomsb. How many atoms remain after 21 200分求一道物理题,求懂英文的高手来帮下忙A certain isotope has 80 protons and 122 neutrons in its nucleus.Identify the element involved and find the atomic and mass numbers.Atomic number=Mass number= 求大神解答一道高中物理题,RA 一道科学物理题'求高手求过程'求答案'答得好的'追加分 我有一道物理题 希望高手解答 一道数学题!求各位高手解答! 一道数学题.求各位高手解答.如图上 一道高中数学题 求高手解答 谢谢~ 求高手解答 SAT一道IP题目 一道级数题.求高手解答~~~~~~~~~~~~~ 200分求一道物理题,求帮助 各种求 懂英文的高手嘞Light with a wavelength of 544.6 nm strikes a single slit that is 0.4 mm wide. The diffraction pattern produced by the slit is observed on a wall a distance of 1.4 m from the slit. (a) 200分求一道物理题 求懂英文的高手啊Strontium-89 is a radioactive isotope with an atomic number of 38.How many protons and how many neutrons are present in the nucleus of this isotope?Number of Protons =Number of Neutrons = 这些英文什么意识求高手解答 EXO是什么意思?求英文高手解答 求解答物理题 物理题求解答!