Bảng ghi thời gian rơi của một vật giữa hai điểm cố định

Thời gian rơi
Lần 1	Lần 2	Lần 3	Lần 4
0,345	0,346	0,342	0,343

Sai số tuyệt đối trung bình của thời gian rơi là bao nhiêu?

Đến năm 2020, guốc gia nào sau đây ở châu Phi thuộc thành viên của G20?

Phân loại, đánh giá, thẩm định nguồn sử liệu đã thu thập được là quá trình của việc 

Read the following passage about Renewable energy sources 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] Renewable energy sources, such as solar, wind, and hydroelectric power, have gained global popularity as a sustainable alternative to fossil fuels. [II] Unlike coal and oil, renewable energy generates electricity without releasing harmful emissions, making it a cleaner option for the environment (Jacobson et al., 2017). [III] However, despite the advantages of renewable energy, there are still notable challenges that need to be addressed for it to fully replace traditional energy sources (Ell Abban et al., 2014). [IV]

          One major advantage of renewable energy is its sustainability. Renewable resources, unlike fossil fuels, are naturally replenished and do not deplete over time. For instance, solar power harnesses energy from sunlight, which is virtually endless. In addition, renewable energy contributes to reducing greenhouse gas emissions, which helps combat climate change. Many countries are increasingly investing in renewable technologies to decrease their carbon footprint and meet international climate goals.

          However, renewable energy has certain limitations. One significant issue is its intermittent nature; for example, solar and wind power depend on weather conditions, making it difficult to generate a consistent power supply. This variability can disrupt the energy grid, which relies on a steady supply of electricity to meet demand. Another challenge is the high initial cost of setting up renewable energy facilities. Although prices have decreased in recent years, installing solar panels or wind turbines still requires substantial upfront investment (IRENA, 2019).

          Despite these challenges, advancements in technology are gradually making renewable energy more efficient and accessible. Improved energy storage systems, such as batteries, allow excess power generated during favourable conditions to be stored and used later, ensuring a more reliable energy supply. As technology and infrastructure improve, renewable energy may eventually.

Which of the following best summarizes the passage?

Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions.

a. This gave rise to the demand for golf ball divers whose job is to dive deep into the lakes and ponds around golf courses to find the lost balls. 

b. Most of them are professional scuba divers, but they spend long hours crawling around in mud and carrying heavy buckets. 

c. On average, they find 5,000 balls per lake. 

d. Every year in the UK, millions of golf balls get lost in the water around golf courses. 

e. After cleaning them, they resell or recycle the balls. Sounds dangerous, doesn't it?

Thế nào là phát triển ở thực vật?

Cho 2,24 gam hỗn hợp gồm: CaCO₃ và Mg vào một lượng dung dịch HCl dư. Sau khi phản ứng xảy ra hoàn toàn thấy thoát ra 0,7437 lít hỗn hợp khí ở đkc. Phần trăm khối lượng của Mg trong hỗn hợp ban đầu là

Mark the letter A, B, C or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17. (1,25 point)

a. Mia: Do you have any plans for this Saturday evening?

b. Lisa: Wow, so many famous artists are going to perform there. This band looks so cool. Let’s go to the Saturday show. 

c. Lisa: No, I don’t. Shall we do something together ?

d. Mia: Yes, I‘d love to. How about going to a music show? Let me check the weekend programme at the Modern Arts Centre. Look at their website!

e. Mia: Sounds great.

Đặc trưng của các công ty xuyên quốc gia là

Cho hình chóp S. ABC có đáy ABC là tam giác vuông tại A, \(SA \bot \left( {ABC} \right)\). Hình chiếu vuông góc của đường thẳng SC lên mặt phẳng (SAB) là đường thẳng?

Đâu là điều kiện để tạo mối liên kết giữa hai bảng?

Thao tác nào sau đây được sử dụng để thêm ảnh trong chỉnh sửa hình ảnh?

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Read the following passage about the Science in Service of Humanity 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 has come out of its shell in laboratories to become a powerful force for human advancement. Modern scientific endeavors increasingly focus on addressing real-world challenges affecting communities globally. From developing vaccines that save millions to creating technologies connecting people across continents, science serves humanity in countless ways. This shift represents a fundamental evolution in how we perceive scientific progress—not merely academic pursuit but a practical tool for improving lives and solving pressing problems.

[I] Medical breakthroughs exemplify how science directly benefits humanity. [II] For instance, gene therapy offers hope for those with inherited conditions, while artificial intelligence helps diagnose diseases earlier and more accurately. [III] These advancements didn't happen overnight; scientists had to burn the midnight oil for years before achieving success. [IV] Their perseverance demonstrates that when science targets humanitarian goals, results can transform society profoundly.

Environmental science has emerged as another crucial domain where laboratory work translates into human welfare. Climate scientists provide data informing policy decisions affecting billions. Conservation biologists develop strategies to protect biodiversity, ensuring future generations benefit from natural resources. Agricultural researchers create drought-resistant crops helping communities withstand changing climate conditions. Despite these contributions, environmental science faces challenges including funding limitations, political resistance, and urgency of addressing accelerating climate change. Nevertheless, dedicated scientists continue their work, recognizing environmental health directly impacts human wellbeing.

The future of science in service of humanity looks increasingly collaborative and inclusive. Modern approaches incorporate diverse perspectives, including indigenous knowledge and community participation. Citizen science projects engage non-professionals in data collection, democratizing the scientific process. Open-access publishing makes research findings available to anyone with internet access, not just wealthy institutions. These developments suggest science's greatest potential lies in becoming more accessible and responsive to human needs. As we face complex global challenges, from pandemics to climate change, science serving humanity offers our best hope for a sustainable future.

Which of the following best summarises paragraph 3?

Thể chế chính quyền thời Lê - Trịnh thường gọi là gì?

Việc làm nào sau đây thể hiện quy định của pháp luật về sự bình đẳng của công dân về nghĩa vụ?

Xác định đâu là ý đúng: Có mấy loại nét vẽ?

Nguyên nhân sâu xa dẫn đến Mĩ và Liên Xô chuyển sang thế đối đầu sau Chiến tranh thế giới thứ hai là do

Xác định ý đúng: Chức năng của phân bón?