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:学生作业学帮网 编辑:学帮网 时间:2024/05/13 20:26:45
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atoms
b. How many atoms remain after 21 hours?
Answer= 多少atoms
a.How many atoms of that element remain after 15 hours?
Answer= 1248 atoms
b.How many atoms remain after 21 hours?
Answer= 312 atoms
应该是b
我只能翻译出来。我才初三。我也不会。加油~!
假设我们有39936个原子的放射性物质的半衰期为3小时。
A .多少原子,元素保持15小时后?
回答=多少原子
有多少原子保持21小时后?
回答=多少原子
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!