Phương trình chuyển động và độ lớn vận tốc của hai chuyển động có đồ thị ở hình dưới đây là

Hãy cho biết đơn vị của tần số là

Có bao nhiêu số tự nhiên chã̃n có ba chữ số?

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

     [I] As the world grapples with the finite nature of fossil fuel reserves and the detrimental impact of climate change, the future of energy undeniably lies in renewable sources. [II] Scientists and engineers are making substantial advancements in the development of technologies that more efficiently harness solar, wind, hydro, and geothermal energy. [III] Although the transition to these renewable sources presents significant challenges, it is also regarded as a pivotal step towards establishing a sustainable and resilient energy system. [IV]

     One of the most promising advancements in renewable energy is the enhancement of solar panel efficiency. Progress in photovoltaic technology has led to the creation of panels that convert a higher proportion of sunlight into electricity. Likewise, wind turbines are becoming more and more efficient. They are capable of generating power even under low-wind conditions. These innovations are essential for making renewable energy more feasible and accessible to a broader population.

     However, the transition to renewable energy is fraught with obstacles. The intermittent nature of sources like solar and wind necessitates reliable storage solutions to ensure a consistent power supply. Although battery technology has seen significant improvements, further advancements are imperative to meet growing demand. Moreover, new infrastructure for distributing renewable energy requires expansion and upgrading to accommodate these new power sources.

     The economic impact of transitioning to renewable energy is another critical consideration. While the initial investment in renewable energy infrastructure can be substantial, the long-term benefits include reduced energy costs and job creation in the green energy sector. Governments and private enterprises are increasingly acknowledging the necessity of investing in renewable energy projects, which is crucial for fostering innovation and diminishing reliance on fossil fuels.

     Ultimately, the future of energy hinges on our capacity to innovate and adapt. By continuing to invest in research and development, improving infrastructure, and addressing economic and technical challenges, we can transition towards a more sustainable and environmentally friendly energy system.

The word They in paragraph 2 refers to _______.

Read the following passage about Unconventional Teachers Who Changed Lives 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.

Traditional education focuses on textbooks, but some teachers go beyond these limitations. Mrs. Rodriguez transformed her classroom into a living laboratory. Her students conducted experiments with plants and simple machines. She believed hands-on learning creates deeper understanding than reading alone. When asked why she taught differently, she replied, "I want students to fall in love with discovery." Her methods helped struggling students improve and develop passion for science.

Mr. Jackson abandoned lectures for storytelling and role-playing. His students experienced history by acting out important moments. This approach made history come alive and helped them remember key information. One student said, "Before Mr. Jackson's class, I thought history was boring, but he showed us it's fascinating." He took classes to historical sites and invited veterans to share experiences. These connections helped students understand how past shapes our present.

In a remote village, Ms. Chen taught English without proper textbooks. She created materials using newspapers and song lyrics. Despite limited resources, her students achieved remarkable results through her dedication. "Learning should be joyful, not painful," she told questioning parents. Ms. Chen organized conversation clubs and pen pal exchanges. These activities gave students practical language skills and confidence to use English in real situations.

Coach Williams was a life mentor who taught valuable lessons through sports. He focused on teamwork and fair play rather than winning. Students who struggled academically often excelled in his class. "The playing field is where children learn who they truly are," he explained. He created inclusive activities for all students regardless of athletic ability. Many former students credit him with teaching life skills like resilience and cooperation that helped them succeed after graduation.

In which paragraph does the writer mention why Mrs. Rodriguez used hands-on experiments?

Điều kiện xác định của phương trình \(\sqrt{4-2 x}=\frac{x+1}{x^{3}-3 x+2}\) là

Chất nào sau đây có tác dụng diệt khuẩn có tính chọn lọc?

Những việc làm nào dưới đây là vi phạm đạo đức sinh học?

Cây lương thực được phát triển ở nhiều nơi của Đông Nam Á do nguyên nhân chủ yếu nào sau đây?

Tăng trưởng kinh tế là sự gia tăng của GDP hoặc GNP hoặc thu nhập bình quân đầu người trong một thời gian nhất định. Tăng trưởng kinh tế thể hiện sự thay đổi về lượng của nền kinh tế. Tuy vậy, ở một số quốc gia, mức độ bất bình đẳng kinh tế tương đối cao nên mặc dù thu nhập bình quân đầu người cao nhưng nhiều người dân vẫn sống trong tình trạng nghèo khổ. Phát triển kinh tế mang nội hàm rộng hơn tăng trưởng kinh tế. Phát triển kinh tế bao gồm tăng trưởng kinh tế cùng với những thay đổi về chất của nền kinh tế như phúc lợi xã hội, tuổi thọ… và những thay đổi về cơ cấu kinh tế như giảm tỉ trọng của khu vực sơ khai, tăng tỉ trọng của khu vực chế tạo và dịch vụ.

Theo thông tin, sự khác biệt cơ bản giữa “tăng trưởng kinh tế” và “phát triển kinh tế” là gì?

Chọn cặp từ/ cụm từ thích hợp nhất điền vào chỗ trống.

Độc lập là điều tuyệt vời ___________ việc tin rằng bản thân không cần sự giúp đỡ của bất kì ai thực sự có thể cản trở bạn, ___________ việc cố gắng làm mọi thứ một mình có thể khiến bạn cô đơn, căng thẳng và ngăn bạn học hỏi từ người khác, hạn chế bạn xây dựng các mối quan hệ có ý nghĩa.

Tự tình II thuộc thể thơ nào sau đây?

Mục đích chính của việc thu, chi ngân sách nhà nước là gì?

Nền tảng kinh tế cơ bản của Ai Cập cổ đại là 

Cho cấp số nhân với \({{u}_{1}}=3;q=-2.\) Số 192 là số hạng thứu mấy của cấp số nhân? 

Read the passage carefully. Choose an option (A, B, C or D) that best answers each question from 23 to 30.

1. How do children learn about wildlife? And is what they learn the sort of thing they should be learning? It is my belief that children should not just be acquiring knowledge of animals but also developing attitudes and feelings towards them based on exposure to the real lives of animals in their natural habitats. But is this happening?

2. Some research in this area indicates that it is not. Learning about animals in school is often completely disconnected from the real lives of real animals, with the result that children often end up with little or no understanding or lasting knowledge of them. They learn factual information about animals, aimed at enabling them to identify them and have various abstract ideas about them, but that is the extent of their learning. Children's storybooks tend to personify animals as characters rather than teach about them.

3. For direct contact with wild and international animals, the only opportunity most children have is visiting a zoo. The educational benefit of this for children is often given as the main reason for doing it but research has shown that zoo visits seldom add to children's knowledge of animals – the animals are simply like exhibits in a museum that the children look at without engaging with them as living creatures. Children who belong to wildlife or environmental organizations or who watch wildlife TV programmes, however, show significantly higher knowledge than any other group of children studied in research. The studies show that if children learn about animals in their natural habitats, particularly through wildlife-based activities, they know more about them than they do as a result of visiting zoos or learning about them in the classroom.

4. Research has also been done into the attitudes of children towards animals. It shows that in general terms, children form strong attachments to individual animals, usually their pets, but do not have strong feelings for animals in general. This attitude is the norm regardless of the amount or kind of learning about animals they have at school. However, those children who watch television wildlife programs show an interest in and affection for wildlife in its natural environment, and their regard for animals in general is higher.

What could be the best title for the passage?

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

     On a stormy night in 1707, four ships struck rocks off the south coast of England and sank. [I] One thousand, four hundred sailors were drowned. [II] The ships had crashed because they had no way of knowing how far they had travelled in a particular direction; they could not calculate their longitude, which required accurate time measurement. [III] In such difficult circumstances, they believed that the best response to the disaster was a competition: the Longitude Prize. [IV]

     The Longitude Prize was no ordinary competition. To win it, someone had to find a way of calculating how far a ship had travelled east or west from its point of departure. Geniuses such as Sir Isaac Newton had failed to find a solution, so to ensure the interest of Britain’s greatest scientific minds, the government offered a prize of £20,000 — the equivalent of £2.6 million in today’s money. But to everyone’s surprise, it wasn’t a famous academic who solved the problem, but an unknown carpenter.

     When John Harrison wasn’t working with wood, he was making clocks. An accurate clock would allow sailors to calculate their position, but at the time it was thought impossible to create a mechanical clock that could work on a ship. The movement of the sea and the changes in temperature destroyed the delicate parts. However, after three frustrated attempts, Harrison’s fourth sea clock, H4, finally triumphed. Its mechanics were so good that the H4 worked better than most clocks on land.

   The Longitude Prize and Harrison’s success generated a lot of interest in the 18th century, but it was soon forgotten. However, in 2013, the British government created a new Longitude Prize, offering £10 million to the person who could solve a great challenge to humanity. An enthralled public then took part in a TV programme where viewers chose one challenge from a list of six for scientists to focus on. The question now is, will someone be able to solve it just as well as Harrison solved the challenge presented to him?

Where in paragraph 1 does the following sentence best fit?
It was the most serious in a series of accidents at sea, and a stunned British government decided to act

Trong trường hợp dưới đây, yếu tố nào của thị trường tác động đến giá vé?

"Vào những ngày cuối tuần, mọi người được nghỉ nên nhu cầu xem phim để giải trí thường tăng cao cho nên giá vé xem phim vào cuối tuần thường cao hơn ngày thường".

Đâu là hình thức để công dân thực hiện đúng quyền tự do ngôn luận?