Giới hạn quang điện của các kim loại kali, canxi, nhôm, kẽm, bạc lần lượt là:$\mathrm{0,55}\mu m;$$\mathrm{0,43}\mu m;$$\mathrm{0,36}\mu \text{m};\mathrm{0,35}\mu \text{m};\mathrm{0,26}\mu \text{m}$. Biết hằng số plăng $h=\mathrm{6,625}\cdot {10}^{-34}\text{Js}$ , tốc độ ánh sáng trong chân không $c={3.10}^8\text{\hspace{0.17em}m/s}$ . Một nguồn sáng phát ra ánh sáng đơn sắc, mỗi photon mang năng lượng ${5.10}^{-19}\text{ J}$ . Chiếu ánh sáng từ nguồn này vào bề mặt các kim loại trên, hiện tượng quang điện xảy ra trên mấy kim loại?

Sử liệu là gì?

Kết quả điều tra tổng thu nhập trong năm 2022 của một số hộ gia đình trong một địa phương được ghi lại ở bảng sau:

Khoảng biến thiên của mẫu số liệu trên là

Sự ra đời của chính quyền Xô viết ở Nga gắn liền với sự kiện nào sau đây?

Cho $A=\left[ 1;4 \right],\ B=\left( 2;6 \right)$ và $C=\left( 1;2 \right)$. Xác định $X=A\cap B\cap C.$

Hi Tim,

a. I hope you’re as excited as I am for this amazing night ahead!

b. I just booked our tickets for the concert next Saturday – it’s going to be a blast.

c. I can’t believe the day is coming up so soon, and we’re finally going to see them live!

d. Get ready for what will definitely be an unforgettable night filled with awesome music and great vibes.

e. Don’t forget to bring your ID for entry; they’re being quite strict with the rules this year.

Looking forward to it,

Jess

Khi cung bằng cầu sẽ dẫn đến tình trạng nào sau đây?

Phát biểu nào sau đây là đúng khi nói về sóng điện từ?

Cho hình chóp \(S.ABCD\) có đáy \(ABCD\) là hình bình hành.

Chủ thể tiêu dùng có vai trò

Chọn ý đúng: Trình độ kĩ sư chọn giống cây trồng là:

Chế độ chính trị ở Việt Nam là thể chế gì?

Cho hai tập hợp $A=\left\{ 1;2;3 \right\}$ và $B=\left\{ 1;2;3;4;5 \right\}.$ Có tất cả bao nhiêu tập $X$ thỏa mãn $A\subset X\subset B?$

Read the following passage about lifelong learning and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

[I] Lifelong learning is the ongoing, voluntary, and self-motivated pursuit of knowledge for personal or professional development (Knowles, 2020). [II] This concept emphasizes that learning does not stop after formal education, but rather continues throughout an individual's life, adapting to changing circumstances and needs. [III] In today’s fast-paced world, where technology and job markets evolve rapidly, lifelong learning has become increasingly essential. [IV]

One of the primary benefits of lifelong learning is its ability to enhance employability. Individuals who engage in continuous education are more likely to keep their skills relevant and competitive in the job market. According to a report by the World Economic Forum (2021), over 50% of employees will need reskilling due to technological advancements in the coming years. Lifelong learners are better equipped to adapt to these changes, making them more attractive candidates for employers.

Moreover, lifelong learning contributes to personal fulfillment and mental well-being. Engaging in new learning experiences can stimulate the brain, foster creativity, and improve cognitive function. Research indicates that individuals who pursue learning opportunities throughout their lives tend to report higher levels of happiness and life satisfaction (Smith & Johnson, 2019). Whether it is taking a course, learning a new language, or picking up a new hobby, the process of acquiring knowledge can be enriching and enjoyable.

In addition, lifelong learning promotes social engagement and community involvement. Participating in educational programs or community workshops can foster connections with others who share similar interests. This social aspect of learning can enhance one's sense of belonging and support networks, which are crucial for mental health (Jones, 2022).

Overall, lifelong learning is not just an individual responsibility; it requires support from educational institutions, employers, and communities to create an environment conducive to continuous education. By fostering a culture of learning, society can better prepare individuals for the challenges of the future and ensure that everyone has the opportunity to thrive.

Which of the following best summarizes the passage?

Read the following passage about lifelong learning and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

[I] Lifelong learning is the ongoing, voluntary, and self-motivated pursuit of knowledge for personal or professional development (Knowles, 2020). [II] This concept emphasizes that learning does not stop after formal education, but rather continues throughout an individual's life, adapting to changing circumstances and needs. [III] In today’s fast-paced world, where technology and job markets evolve rapidly, lifelong learning has become increasingly essential. [IV]

One of the primary benefits of lifelong learning is its ability to enhance employability. Individuals who engage in continuous education are more likely to keep their skills relevant and competitive in the job market. According to a report by the World Economic Forum (2021), over 50% of employees will need reskilling due to technological advancements in the coming years. Lifelong learners are better equipped to adapt to these changes, making them more attractive candidates for employers.

Moreover, lifelong learning contributes to personal fulfillment and mental well-being. Engaging in new learning experiences can stimulate the brain, foster creativity, and improve cognitive function. Research indicates that individuals who pursue learning opportunities throughout their lives tend to report higher levels of happiness and life satisfaction (Smith & Johnson, 2019). Whether it is taking a course, learning a new language, or picking up a new hobby, the process of acquiring knowledge can be enriching and enjoyable.

In addition, lifelong learning promotes social engagement and community involvement. Participating in educational programs or community workshops can foster connections with others who share similar interests. This social aspect of learning can enhance one's sense of belonging and support networks, which are crucial for mental health (Jones, 2022).

Overall, lifelong learning is not just an individual responsibility; it requires support from educational institutions, employers, and communities to create an environment conducive to continuous education. By fostering a culture of learning, society can better prepare individuals for the challenges of the future and ensure that everyone has the opportunity to thrive.

According to paragraph 2, which of the following is NOT a benefit of lifelong learning?

Read the following passage about the A Vision of a Harmonious Multicultural Society and mark the letter A, B, C or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

By 2050, our world will have undergone remarkable transformations in how different cultures coexist. The walls that once divided nations are vanishing into thin air as global citizens embrace diversity like never before. Technology will serve as the great equalizer, with translation devices making language barriers a thing of the past. In urban centers worldwide, neighborhoods will showcase architectural influences from multiple cultures, creating spaces where everyone feels at home regardless of their background. Public spaces will feature gardens with plants from different continents, symbolic of how various cultures can thrive together in one environment.

[I] Education systems will prioritize cultural literacy alongside traditional subjects. [II] Schools will teach world history from multiple perspectives rather than through a single cultural lens. [III] Students will routinely participate in virtual exchange programs, allowing them to form friendships with peers around the world without leaving their classrooms. [IV] Government policies will recognize that a harmonious multicultural society requires institutional support, with resources allocated to community centers where cultural exchange happens organically through shared meals, festivals, and collaborative art projects.

Economic systems will evolve to value diverse approaches to business and innovation. Companies will actively seek employees from varied backgrounds, recognizing that diverse teams create more innovative solutions. Traditional knowledge from indigenous communities will be respected and incorporated into sustainable development practices. The entertainment industry will produce content that authentically represents multiple cultures, moving beyond stereotypes to show the complexity within each tradition. Digital platforms will help preserve endangered languages and cultural practices through accessible archives and learning tools.

The greatest achievement of this harmonious world will be a new understanding of human identity. People will identify with multiple cultural traditions simultaneously without feeling conflicted about their loyalties. Holidays from various traditions will be celebrated collectively, creating new hybrid celebrations that honor multiple heritages. The concept of "us versus them" will gradually fade as people recognize shared values across different traditions. While challenges will remain, the dominant attitude will be one of curiosity rather than fear when encountering differences.

Which of the following is NOT mentioned as a feature of the world in 2050?

Nguyên tử của nguyên tố sodium (Z = 11) có cấu hình electron là