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习题练习：Half-life and decay constant
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 作者: admin  发布日期: 2024-08-05 18:06    总分: 10分  得分: _____________

答题人: 匿名未登录  开始时间: 24年08月05日 18:06  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  94.24: A sample of radioactive material has an initial activity of 10,0m l83dv bkogt:lc+ooa.; -c4x 00 counts/minute. 30 minutes later, its activity is 2,500 counts/minute. The half-life of thktl cb3+8;: .c-mgd o4xovo lae material is:

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  95.22: A radioactive element has a half-life of 4.0 hours. Approximately ho 6dmmrgea g()j 0hge3-w much of th(g0-m6)j 3hgd rgemeae radioactive element will remain after 12.0 hours?

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  97.25: Originally th 35/b rnl2srynere are N atoms of an unstable isotope. After 20 minutes, only 1/16 of them have not decayed. Wharrbn 5yns23l/t is the half life of the isotope?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  01.17: If 25% of a sample of a radioactive isotope decays in 4 hoursh w;p5cw/z mr39wnh1 n, we would estimate the sample's half life to be n9nhw 5 3c wwm/rpzh;1about

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  04.06: Radon gas emits gammaki,5t :uzm(cw rays and is used in hospitals to treat cancer. Its half-life is about 3.8 days. Starting with a pure sample of radon, the percentage left after 19 z t,muw5kc (i:days will be about

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  07.50: A gas undergoes radioac ,.1ihcuufvw 3ppae-e st *9w-tive decay with time constant $\tau$. A sample of 10000 particles is put into a container. After one time constant has passed, the experimenter places another 10000 particles into the original container. How much time passes from the addition of the particles until the container of gas reaches 10000 total particles again?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  08.47: A radioactive sample decays with a half-li3qxm4a5mhy *ua7x0d* c(qzdsi1d )bp xe19 gmfe of 2.0 yr. Approximately how much time must pass so that only 1/3 of*qe71 mapxbs)d a xy*hgcqi45zd 1xmdm39(0u the original sample remains?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  10.44: A radioactive sample of gas has a half-life of 100 0 bc*.xjwx, ;* bpilekseconds. If there are initially 10000 of these gas molecules in a closed container, approximaxb 0ij;w*xbc*lpke,. tely how many of the molecules remain after a time of 250 seconds elapses?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A hypothetical radioactive substance Aaptinium decays ,0 nn vyxor36ovia alpha-emission into Physicsbowlium. The decay connoo,0n x3y v6rstant for this alpha-emission is 20 $s^{-1}$.
12.41: Which one of the following statements correctly compares Physicsbowlium to Aaptinium?

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A hypothetical radioactive substance Aaptinium decays via alpha-emission 2hd6l37i lk u6 ozozu5 8n/n 9rvawd tpiy-u0;into Physicsbowlium. The decay consta 8l6u;v3o iuzwd9ti/zoa6nk r20hpd7u-5yn lnt for this alpha-emission is 20 $s^{-1}$.
12.42 What is the half-life of Aaptinium?

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