Một đầu đạn đang bay theo phương nằm ngang với vận tốc 700 m/s thì nổ và tách ra thành hai mảnh với các khối lượng m₁ = 3kg và m₂ = 5kg. Sau khi nổ mảnh lớn tiếp tục bay lên phía trước với vận tốc 1200 m/s. Động lượng của đầu đạn trước khi nổ và của mảnh nhỏ hơn sau khi nổ lần lượt bằng

Cho khoảng cách từ Trái Đất đến Mặt Trời R = 1,5 . 10¹¹m, G = 6,67 . 10^-11 Nm²/kg² thì khối lượng Mặt Trời M_T xấp xỉ bằng:

Một đầu đạn đang bay theo phương nằm ngang với vận tốc 700 m/s thì nổ và tách ra thành hai mảnh với các khối lượng m₁ = 3kg và m₂ = 5kg. Sau khi nổ mảnh lớn tiếp tục bay lên phía trước với vận tốc 1200 m/s. Động lượng của đầu đạn trước khi nổ và của mảnh nhỏ hơn sau khi nổ lần lượt bằng

Viên đạn khối lượng m = 100g đang bay     

đến với vận tốc v = 10 m/s cắm vào bao

cát khối lượng M = 400g treo trên dây dài

l = 1m và đứng yên.

Sau khi đạn cắm vào, bao cát chuyển

động với vận tốc bao nhiêu?

Một hòn bi khối lượng m đang chuyển động với vận tốc v₁ và chạm vào hòn bi thứ hai khối lượng 2m nằm yên.

Tỉ số giữa động năng của hai vật trước và sau va chạm là bao nhiêu trong va chạm mềm ?

Động năng của vật tăng khi

Một quả bóng được ném chuyển động trong trọng trường. Đại lượng nào là không đổi trong quá trình quả bóng bay trong không khí

Một con tàu vũ trụ khối lượng m trở về Trái Đất với động cơ ngừng hoạt động. Trong quá trình đổ bộ xuống mặt đất từ khoảng cách R₁, đến khoảng cách R₂ (tính đến tâm Trái Đất) nó chỉ chịu tác dụng trọng trường của Trái Đất (M khối lượng Trái Đất và G là hằng số hấp dẫn). Trên quãng đường đó động năng của con tàu tăng thêm một lượng bằng bao nhiêu:

Một quả bóng khối lượng 300g bay vuông góc đến tường với vận tốc 6 m/s rồi bật ra với cùng vận tốc. Độ biến thiên động lượng của quá bóng là

Hai vật có khối lượng m bằng nhau được kéo dọc theo hai mặt phẳng nghiêng AB và CB với vận tốc không đổi, trong đó góc α₁ > α₂. Bỏ qua ma sát (hình bên):

So sánh công của lực kéo trong hai trường hợp. Chọn câu đúng?

Số hạng không chứa trong khai triển là:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from life’s obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to “feel” anything unpleasant and we certainly don't want our children to “suffer”. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I don’t believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young “adults” with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

Question 42: According to the writer, failure in life and less support from parents will _______.  

Sau khi khai triển và rút gọn biểu thức   thì có bao nhiêu số hạng?  

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from life’s obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to “feel” anything unpleasant and we certainly don't want our children to “suffer”. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I don’t believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young “adults” with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

Question 43: What is probably the writer's attitude in the passage?         

Cho là số nguyên dương thỏa mãn . Hệ số của số hạng chứa của khai triển biểu thức bằng:                

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from life’s obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to “feel” anything unpleasant and we certainly don't want our children to “suffer”. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I don’t believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young “adults” with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

Question 40: Which of the following is NOT TRUE according to the passage?         

Trong mặt phẳng cho tập hợp gồm điểm phân biệt trong đó không có điểm nào thẳng hàng. Số tam giác có điểm đều thuộc là:  

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from life’s obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to “feel” anything unpleasant and we certainly don't want our children to “suffer”. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I don’t believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young “adults” with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

Question 41: The word “them” in the last paragraph refers to _______.           

Trong khai triển , hệ số của số hạng chứa là :         

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions:

In my experience, freshmen today are different from those I knew when I started as a counselor and professor 25 years ago. College has always been demanding both academically and socially. But students now are less mature and often not ready for the responsibility of being in college. It is really too easy to point the finger at parents who protect their children from life’s obstacles. Parents, who handle every difficulty and every other responsibility for their children from writing admission essays to picking college courses, certainly may contribute to their children's lack of coping strategies. But we can look even more broadly to the social trends of today. How many people do you know who are on medication to prevent anxiety or depression? The number of students who arrive at college already medicated for unwanted emotions has increased dramatically in the past 10 years. We, as a society, don't want to “feel” anything unpleasant and we certainly don't want our children to “suffer”. The resulting problem is that by not experiencing negative emotions, one does not learn the necessary skills to tolerate and negotiate adversity. As a psychologist, I am well aware of the fact that some individuals suffer from depression and anxiety and can benefit from treatment, but I question the growing number of medicated adolescents today. Our world is more stressful in general because of the current economic and political realities, but I don’t believe that the college experience itself is more intense today than that of the past 10 years. What I do think is that many students are often not prepared to be young “adults” with all the responsibilities of life. What does this, mean for college faculty and staff? We are required to assist in the basic parenting of these students - the student who complains that her professor didn't remind her of the due date for an assignment that was dearly listed on the syllabus and the student who cheats on an assignment in spite of careful instructions about plagiarism. As college professors, we have to explain what it means to be an independent college student before we can even begin to teach. As parents and teachers we should expect young people to meet challenges. To encourage them in this direction, we have to step back and let them fail and pick themselves up and move forward. This approach needs to begin at an early age so that college can actually be a passage to independent adulthood.

Question 38: According to the writer, students' difficulties to cope with college life are partly due to _______.