A hunter aims directly at a target (on the same level) 61.0 m away. If the bullet leaves the gun at a speed of 176 m/s, by how much will it miss the target?
At what angle should the gun be aimed so as to hit the target?
Dx = V*t,
t = Dx/V = 61 / 176 = 0.347 s.
Dy = 0.5g*t^2 = 4.9*(0.347)^2=0.589 m.=
Miss distance.
b. Dx = Vo^2*sin(2A)/g = 61 m,
(176)^2*sin(2A)/9.8 = 61,
Divide both sides by (176)^2:
sin(2A) / 9.8 = 1.9693*!0^-3,
Multiply both sides by 9.8:
sin(2A) = 0.0193,
2A = 1.1058,
A = 0.553 Deg.
The Chinese mainland reported 61 new cases of COVID-19 in eight provinces and cities yesterday, 45 of which were in Jiangsu province, with yangzhou reporting 40 new cases in a single day.Cases have also been reported in the first-tier city of Shanghai.
China's National Health Commission reported 61 new confirmed cases yesterday, including 45 in Jiangsu, six in Hunan, three in Hubei, two each in Henan and Yunnan, and one each in Beijing, Shanghai and Fujian.
In addition, 23 new asymptomatic cases were reported in Henan province, six in Hubei province and two in Hunan Province.
The new local case in Shanghai is a resident of the Pudong New Area and a service worker of a foreign cargo plane in the cargo area of the Pudong Airport. 43 close contacts have been traced to Shanghai and have been placed under quarantine.
According to CCTV news, Shanghai Pudong International Airport last night organized a collective nucleic acid test for all relevant personnel and terminal disinfection of relevant areas.
Of the 45 new local cases in Jiangsu, five were in Nanjing, while 40 were reported in Yangzhou.Since July 20, a total of 220 confirmed local cases have been reported in Nanjing and 94 in Yangzhou.
Yangzhou upgrade again for area traffic control management measures, the local epidemic prevention and control work headquarters notice said that starting from today all of yangzhou city in addition to the closed area plot upgrade traffic control management measures, the traffic control management community (village) keep only one entrance, ensure that two or more persons manned 24 hours a day, other entrance will be closed.
The first asymptomatic case was reported in Erqi District of Zhengzhou on July 30, and 13 new cases and 50 asymptomatic cases have been reported in Zhengzhou as of 18 PM on August 2, the city said yesterday.
After genetic sequencing, the virus strains of the first two infected people and the confirmed patients who entered Myanmar and received treatment at the Sixth Hospital in Zhengzhou were highly homologous, and both were delta mutant strains.
Most of the 63 infected people were connected to the Sixth Hospital in Zhengzhou, the report said, adding that although there was no obvious intersection between them, they either lived near the sixth hospital or had been active in the area recently.
What is the IB
The International Baccalaureate programme (IB) was established in 1968 to provide students aged 3 to 19 with four high quality and challenging educational programmes that promote critical thinking and flexible learning across interdisciplinary, cultural and national boundaries through a unique curriculum at a high academic level;The programme for 16 - to 19-year-olds is known as the IBDP, which "integrates the best of each country's educational system rather than being based on any one" (UK Qualifications and Curriculum Council, 2003).At IBDP, students are expected to learn at least two languages and improve their understanding of various cultures, including their own;Through the program's unique epistemology course, it establishes links between traditional disciplines and explores the nature of knowledge;To conduct in-depth research in a particular area of interest through one or more disciplines by writing a monograph;Strengthen their personal and interpersonal growth through creation, action and service.
IB University Applications for Affiliated Middle School in 2021 (part)
The harvest of learning and knowledge
Zhang Zhichen (Architecture major, Cornell University) : PERSONALLY, I think the IB study is not too heavy. It still gives us a lot of space to explore and develop. Especially in the two liberal arts classes, I think I have found my own humanities language.In IB, if you have self-discipline, you will gain vast freedom.The "law" of self-discipline here is not a "commandment" but a "law".One of the best things about IB classes is that to excel, you just give yourself a little bit of discipline and discipline and then interact with everyone around you with curiosity and humility.
Zhou Ruilin (Engineering, New York University, ABU Dhabi) : IB has a lot of interesting clubs and gives me a lot of opportunities to exercise.In my senior year of high school, I joined the music and drama club. What impressed me most was the rehearsal of Beauty and the Beast for the charity performance.I was in the FTC club.I was in charge of programming robots to run and perform tasks in the community.In this process, I need to constantly debug the program.Although it is time-consuming and a little boring, it is actually quite interesting, especially when you see the robot can actually move to complete the corresponding task according to your instructions, it is very fulfilling.I remember that I had to adjust the program every night for a week after the final exam in the last semester of high school sophomore. Finally, I managed to adjust the program before the game.
Stuart (Chemistry, Rice University) : IB is a place that encourages personal development.Here, you can not only find excellent mentors, but also get a good experimental environment.This kind of full academic and personal development is very rare.
Boning CAI (Engineering, University of Michigan, Ann Arbor) : The biggest thing I felt about IB was thesis writing. There was a thesis writing for almost every subject.Among them, science needs to do experiments, analyze data and draw conclusions;Liberal arts require a lot of reading.The initial topic selection of these papers is very critical, when I determined the topic selection of physics papers for a long time, I consulted a lot of books and materials, and finally fixed the line of sight in a contest problem once done, the instructor said I had written very well.Although the process of writing the paper was challenging, I felt a great sense of achievement after writing it.At the same time, I also understand that paying attention to every detail in daily study and life may become inspiration for my future research.
Liao Tianle (Mathematics, Cambridge University) : I was lucky. Although MY primary and junior high school education was traditional, I quickly adapted to the IB learning pace and read more math books in my spare time every day.I think the breadth of IB mathematics can give students a broader perspective, and at the same time IB mathematics encourages students to do independent research and thinking, which has a greater effect on the improvement of students' comprehensive mathematics ability.
Pointing to the sea
△ 31 kilometers of walking
▽ FTC robot
△ Artistic creation
Ding Tianxing (Sociology, Vassar College) : I didn't have a strong aptitude for math, but I always did well in math, and a big part of that is due to my math teacher, Antonio.He is one of the few teachers I have met who has his own philosophy of education.In his class, students can always hear some golden sentences, and the one that impresses me the most is:It's not a problem that you don't know. It's a problem that you don't know."Not knowing you don't know" is the problem).This sentence had a very significant impact on my later learning style. I came to understand that everyone does not understand things, but we must admit our ignorance.Therefore, in the later encounter any subject problems, I will be sure to ask the teacher in time, not let go of any question.
Speaking of IB memories, many students shared the same story about the influence of their teachers:
"Teacher of biology teacher wei read a lot of books, he can express oneself original view to the book that read, usually compare fun, attract the book interest that classmates speak to him is very high, still can look for to see.Personally, I think having my own comments on a book will make it easier for students to be interested in this book. Sometimes I feel very harvested after listening to him talk about a book.Discussing a book with him was fun and sometimes opened doors to new worlds."
"What impressed me most about Mr. Andrei was his ability to discuss a physics topic from different angles.His reading volume allows her to completely 'control' the class, allowing all students to promote their own thinking;At the same time, he was able to answer all kinds of strange questions from his classmates.Taking real cases at hand is also a big reflection of his reading amount. The class is very natural, so that we feel that there is no trace of deliberate lesson preparation.This may be the most comfortable way to absorb knowledge.Although a Bulgarian, he has a strong sense of family and country.He was engaged in front-line scientific research work in the Soviet Union and the United States for 19 years, and his understanding of physics has benefited us a lot.He's Lin Daiyu from Bulgaria."
(Welcome to the Attached Middle School to learn more about IB...)
On March 26, a group of teenagers dressed in "affiliated middle School green" school uniforms, become the flow of nanjing youth scenery!From the Lushuiwan Wetland Park in Jiangbei New District, along the Yangtze River and across the Yangtze River Bridge, we walked all the way back to the Middle School affiliated to Nanjing Normal University. It took 31 kilometers and 8 hours. More than 1600 teachers and students from grade one and Grade two measured Nanjing with their feet, and started the traditional "walking action" of the school.
The theme of this action is "youth walking on the road, youth ambition in all directions", consisting of three sections along the Yangtze River, the students use their steps to measure the course of the rejuvenation of the motherland, through the history, to the future.At lunch time, students took out the 31 km walker manual carefully made by the school and went to Lu Yi Zhang, a volunteer of class 14, Grade 2, to stamp and punch in.
After finishing the two routes, the students took a rest in the riverside ecological park in the north of the bridge."It's easy to walk down two routes," said Zhang Ruiyang, a sophomore in high school. "I usually get enough physical exercise at school."Zhang ruiyang is especially looking forward to the third section of the route, because there will be such scenic spots as Yuejiang Tower, but also can cross the Yangtze River bridge, appreciate the revolutionary spirit of the ancestors.
Finally arrived at the "last kilometer", the students to escort the volunteer parents and teachers continue to cheer the students, approaching the end of the line, everyone welcomed, holding flowers, to welcome the "soldiers" triumphal return.
"Walker Action" is one of the active courses of the Affiliated Middle School of South Normal University. Since 2001, it has formed a will training course consisting of two activities: "11-kilometer walk" in the first semester of grade one and "31-kilometer walk" in the second semester of grade one.Ju Yan, secretary of the discipline Inspection Commission of the affiliated Middle School of South Normal University, told reporters that this year, the increase of high school, high school two walk together, everyone together to visit the Green Water Bay wetland park, Dingshan city living room, bridge north Binjiang ecological park, finally back to the school, each to set up a stamp office."I hope the journey will inspire a stronger sense of patriotism among students. For example, we will walk through Liu Pocheng Square. We will walk on the Yangtze River Bridge, which has stood on the river for more than 50 years.The route was divided into three sections, each with a clock-in point, and we gave each student a very beautiful manual for the 31 km walk, which they helped to produce.On the last page of the manual is a clock-in chart, which I hope will be a very good memory of their high school life."
Lin Yutang, in his wonderful "The Genius: The Life and Time of Su Dongpo," says how many SINS the government has committed in the name of the people in history.At present, the prevention and control of the epidemic, Dongtai regardless of the safety of the people, forced to drag people to the countryside for nucleic acid testing.How can we fight the epidemic without love, temperament and human rights?Now, bureaucracy, formalism into the trend of The Times, Dongtai follow this step, this is just their show, acting for the day to see, they believe with the wisdom of the crow: "in a peaceful and peaceful place, not to hold nucleic acid testing is a brain problem.I have to do it to get promoted."Alas, is the power of the masses strong?
I have thought the question for a long time
There are some basic formula which are very important
and it is easy to change the data to become new questions.
Dx = V*t,
t = Dx/V = 65 / 178 = 0.349 s.
Dy = 0.5g*t^2 = 4.9*(0.349)^2=0.592 m.=
Miss distance.
b. Dx = Vo^2*sin(2A)/g = 68 m,
(175)^2*sin(2A)/9.8 = 68,
Divide both sides by (176)^2:
sin(2A) / 9.8 = 1.9693*!0^-3,
Multiply both sides by 9.8:
sin(2A) = 0.0193,
2A = 1.3658,
A = 0.68 Deg.