Cung cấp một nhiệt lượng 45600 J để nung nóng một khối kim loại nặng 2 kg từ 10 ^oC lên 70 ^oC. Nhiệt dung riêng của khối kim loại này là bao nhiêu J/kg.K?

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

URBANISATION: A GROWING PHENOMENON

     Urbanisation is the process through which cities grow, and higher populations begin to inhabit urban areas. This phenomenon has accelerated significantly over the past few decades due to various factors. One of the primary drivers is the search for better employment opportunities. In rural areas, job prospects are often limited to agriculture and small-scale industries, which might not provide sufficient income. Consequently, people migrate to cities seeking better livelihoods and living standards.

     Additionally, urban areas offer more advanced educational facilities and healthcare services compared to rural regions. Many families move to cities to provide their children with higher-quality education and greater future opportunities. Access to hospitals and specialized medical services also attracts people to urban centers, especially in countries where rural healthcare is underdeveloped.

     However, rapid urbanisation brings about several challenges. Overcrowding in cities can lead to inadequate housing, strained infrastructure, and increased pollution. The expansion of urban areas often results in the loss of green spaces and agricultural land, impacting food production and the environment. Governments and city planners must address these issues to ensure sustainable urban growth.

     Despite these challenges, urbanisation has several positive aspects. Cities are often cultural melting pots, where diverse groups of people interact, leading to vibrant communities and innovation. The concentration of resources and talents in urban areas can drive economic growth and technological advancements.

The word This phenomenon in paragraph 1 refers to ____.

Xác định một từ/cụm từ SAI về ngữ pháp/hoặc ngữ nghĩa/logic/phong cách.

Những ký ức về phố Hàng Bột được tác giả Hồ Công Thiết trình bày một cách xúc động trong cuốn sách “Phố Hàng Bột truyện tầm phào mà nhớ”.

Điền vào chỗ trống kết quả chính xác hoặc kết quả làm tròn xấp xỉ đến chữ số thập phân thứ nhất:

Cho hình nón tròn xoay có chiều cao \(h=4m\), bán kính đáy \(r=3m\):

Diện tích xung quanh của hình nón đã cho bằng (……) \({{m}^{2}}\) (Kết quả làm tròn đến chữ số thập phân thứ nhất, biết \(\pi \approx 3,14\)).

Không gian được gợi mở trong hai câu thực bài thơ Cảm xúc mùa thu?

Cho hàm số \(y=f(x)\) là một hàm đa thức có bảng xét dấu \(f^{\prime}(x)\) như sau: 

Số điểm cực trị của hàm số \(g(x)=f\left(-2 x^2+|x|\right)\).

Ý nào sau đây không phản ánh đúng dấu hiệu nhận diện một cơ hội kinh doanh tốt?

Một động cơ có công suất tiêu thụ bằng 5 kW kéo một vật có khối lượng 1200 kg lên cao 30 m theo phương thẳng đứng trong thời gian 90 s với vận tốc không đổi. Hiệu suất của động cơ này bằng:

Read the following passage about the Exploring The Universe 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.

Science is a vast and fascinating field that seeks to understand the natural world and the universe beyond[I]. It encompasses various disciplines, including physics, chemistry, biology, and astronomy[II]. Each of these areas contributes to our understanding of complex phenomena, [III]. For instance, scientific research has led to significant breakthroughs in medicine, renewable energy, and environmental conservation[IV]. In this essay, we will explore the impact of science on our lives, particularly focusing on space exploration.

One of the most intriguing aspects of science is space exploration. Humans have always looked to the stars, wondering what lies beyond our planet. The launch of satellites and manned missions has allowed us to gather valuable information about the cosmos. For example, NASA's Mars Rover has provided insight into the potential for life on other planets. Through meticulous research and data collection, scientists can analyze soil samples and atmospheric conditions, paving the way for future explorations.

Space exploration also raises critical questions about our existence and the future of humanity. As we continue to advance technologically, the prospect of colonizing other planets becomes more plausible. This endeavor could serve as a solution to the challenges we face on Earth, such as overpopulation and resource depletion. However, ethical considerations must guide these efforts. We must ensure that we do not repeat the mistakes of history, such as the exploitation of natural resources and indigenous populations.

Moreover, scientific advancements have enabled us to develop technologies that enhance our understanding of the universe. Telescopes and space probes allow us to observe distant galaxies, study black holes, and uncover the mysteries of dark matter. Each discovery leads to new questions, further fueling our curiosity and drive for knowledge. The concept of the multiverse, for instance, challenges our understanding of reality and pushes the boundaries of scientific thought.

In addition to exploring the universe, science plays a crucial role in addressing pressing issues on Earth. Climate change, for example, is a significant concern that scientists are actively investigating. Through climate models and data analysis, researchers can predict future trends and propose solutions to mitigate the effects of global warming. Public awareness and education are essential in fostering a collective response to environmental challenges.

As we reflect on the wonders of science, it is clear that its contributions extend far beyond mere knowledge acquisition. Science empowers us to make informed decisions about our health, environment, and future. By fostering a culture of curiosity and critical thinking, we can inspire future generations to continue exploring the unknown.

Where in paragraph 1 does the following sentence best fit?

enabling advancements that improve our daily lives

Đối với các hành vi vi phạm quyền và nghĩa vụ công dân về việc bảo vệ Tổ quốc, mỗi chúng ta cần làm gì?

Dịch vụ nào sau đây không phải là dịch vụ lưu trữ qua điện toán đám mây?

Bộ phận nào của phanh có chức năng tạo mômen ma sát giữa phần quay và phần cố định để phanh bánh xe?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct arrangement of the sentences to make a meaningful paragraph/letter in each of the following questions.

a. Also, volunteering helps students connect with the community, making them aware of the needs around them.

b. Additionally, students develop such important skills as teamwork and communication ones while they volunteer.

c. Firstly, students who do voluntary work gain valuable real-world experience which can help in their future careers.

d. Finally, doing volunteer work can be a rewarding experience, as students feel good about helping others.

e. High school students benefit from doing voluntary work in many ways.

Sai số hệ thống là

Dịch tả lợn cổ điển có mấy thể bệnh?

Thân máy và nắp máy trong động cơ đốt trong có vai trò gì?

Cộng hòa Nam Phi tiếp giáp với đại dương nào sau đây?

Read the following passage 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 23 to 30.

SCREEN TIME: MENTAL HEALTH MENACE OR SCAPEGOAT?

    "Have smartphones destroyed a generation?" Jean Twenge - a psychology professor at San Diego State University - asked in her controversial book, iGen. In the book, she argues that those born after 1995 are facing "a mental-health crisis", and she believes it can be linked to growing up with their noses pressed against a screen. Her newest study provides more support for that connection, showing that teens who spent more than an hour or two a day interacting with their gadgets were less happy on average than those who had more face time with others.

    Twenge's conclusions have come up against criticism in the past. Some have accused her work of oversimplifying or overlooking data that may tell a slightly different story. Twenge recognises that her study suggests only a link between screen use and psychological well-being. A possible explanation is that kids are running to their screens to escape from the things in life that are making them unhappy. However, the surveys can't say whether screen time directly changes teens' mental health, the research states.

    Philanthropist Melinda Gates, whose three children were also born after 1995, wrote in The Washington Post, "phones and apps aren't good or bad by themselves, but for adolescents who don't yet have the emotional tools to overcome life's problems, they can aggravate the difficulties of growing up."

    At the same time, she said, kids are learning on their devices and connecting in novel ways. Other studies have explored the connection between social media and isolation and how "likes" activate the brain's reward centre. Some analyses have found that moderate use of these technologies is not harmful in itself and can even improve children's social skills and build emotional strength.

In which paragraph does the writer discuss the benefits of moderate technology use?

Magnesium ammonium là loại thuốc thử dùng để nhận biết nguyên tố nào?