Fermi Problem
On a Monday morning in July, the worlds first atom bomb exploded in the New Mexico desert. Forty seconds later, the shock waves reached the base camp where the Italian-American physicist Enrico Fermi and his team stood, after a mental calculation, Fermi announced to his team that the bombs energy had equated 10,000 tons of TNT. The bomb team was impressed, but not surprised. Fermis genius was known throughout the scientific world. In 1938 he had won a Nobel Prize. Four years later he produced the first nuclear chain reaction, leading us into the nuclear age. Since Fermis death in 1954, no physicist has been at once a master experimentalist and a leading theoretician.
Like all virtuosos, Fermi had a distinctive style. He preferred the most direct route to an answer. He was very good at dividing difficult problems into small, manageable bits talent we all can use in our daily lives.
To develop this talent in his students, Fermi would suggest a type of question now known as a Fermi problem. Upon first hearing one of these, you havent the remotest notion of the answer, and you feel certain that too little information had been given to solve it. Yet when the problem is broken into sub-problems, each answerable without the help of experts or books, you can come close to the exact solution.
Suppose you want to determine Earths circumference without looking it up. Everyone knows that New York and Los Angeles are about 3000 miles apart and that the time difference between them is three hours. Three hours if one-eighth of a day, and a day is the time it takes the planet to complete one rotation, so its circumference must be eight times 3000 or 24000 miles. This answer differs from the true value, 24,902.45 miles, by less than four percent.
Ultimately the value of dealing with everyday problems the way Fermi did lies in the rewards of making independent discoveries and inventions. It doesnt matter whether the discovery is as important as determining the power of an atom or as small as measuring the distance between New York and Los Angeles. Looking up the answer, or letting someone else find it, deprives you of the pleasure and pride that accompany creativity, and deprives you of an experience that builds up self-confidence. Thus, approaching personal dilemmas as Fermi problems can become a habit that enriches you life.
16. Fermis team was impressed by Fermis announcement in the base camp because he could even work out the power of the atom bomb in his mind
A. Right B. Wrong C. Not mentioned
17. Fermi, an experimentalist as well as a theoretician, won a Nobel Prize for producing the first nuclear chain reaction in the world.
A. Right B. Wrong C. Not mentioned
18. Dividing a big problem into small problems is a talent Fermi had and a talent that has practical value in life.
A. Right B. Wrong C. Not mentioned
19. Fermi problem is to develop the talent of breaking a seemingly unanswerable problem into sub-problems and finding the solution to it, which is a typical Fermi problem.
A. Right B. Wrong C. Not mentioned
20. Then the fourth paragraph tells us how Fermi solved the problem of earths circumference without looking up.
A. Right B. Wrong C. Not mentioned
21. The last paragraph concludes the whole writing by stressing the value of important inventions and small discoveries.
A. Right B. Wrong C. Not mentioned
22. Fermi was famous for inventing a device to calculate bombs energy accurately.
A. Right B. Wrong C. Not mentioned
1622 A B A A B B C
2009中考英语词汇表 系列O
初中英语常用词组复习2
2010年中考英语词汇旧词新义:clean
中考英语词汇“for短语”全攻略
2009中考英语词汇表 系列UV
词汇笔记 五种词汇的学习方法 超强
2010年中考英语词汇旧词新义:blind
2009中考英语词汇表 系列N
英乐时空Here I Am
2009中考英语词汇表 系列H
09年中考英语总复习经典习题讲解1一冠词
为英语写作”画龙点睛“的24句谚语
2009中考英语词汇表 系列JKL
2009中考英语词汇表 系列R
2009中考英语词汇表 系列T
中考英语词汇--“美味水果”大聚会
初中英语短语汇总 A- Y
高中英语词汇:80后“A到Z”生存法则
初中英语常用词组2 介词短语词组
2009中考英语词汇短语集锦 (1)
2009最新中考英语单项填空模拟考试卷 附详解答案
2010年中考英语词汇旧词新义:cost
2009中考英语词汇表 系列S
初中英语常用词组3 量词词组
2009中考英语词汇表 系列I
常用英语词语辨析105组(5)
常用英语词语辨析105组(11)
2009中考英语词汇短语集锦 (2)
2010年中考英语词汇旧词新义:cause
2010年中考英语词汇旧词新义:deal
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |