I've read my physics textbook over and over and can't find an answer! Help!
Answer choices are
1) 1/20000
2.) 1/200
3.) 1/2000
4.) 1/1000
5.) 1/10
What is the approximate ratio of the mass of an electron to that of a proton?
2016-04-22 5:31 pm
回答 (3)
2016-04-22 5:59 pm
✔ 最佳答案
According to a table in my physics book, the mass of an electron is 9.11 * 10^-31kg. The mass of a proton is 1.67265 * 10^-27 kg.Ratio = 9.11 * 10^-31 ÷ 1.67265 * 10^-27
This is approximately 0.0005. If you invert this number, this is approximately 1836. So as a fraction this is approximately 1/1836. This is approximately 1/2000. So 3 is the correct answer.
2016-04-22 5:47 pm
Mass of an Electron: (9.11 * 10^ -31) Kg
Mass of a Proton: (1.67 * 10^-27) Kg
Mp / Me = ~2000 so the answer is 3.) 1/2000
Mass of a Proton: (1.67 * 10^-27) Kg
Mp / Me = ~2000 so the answer is 3.) 1/2000
2016-04-22 5:32 pm
1 :: 1836
ANS 3 is closest.
ANS 3 is closest.
收錄日期: 2021-04-21 18:15:26
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160422093120AA3Qi0D