Biết d1 là độ dịch chuyển 5 m về phía Nam, d2 là độ dịch chuyển 8 m về phía Bắc. Độ dịch chuyển tổng hợp d có
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$d = |d_2 - d_1| = |8 - 5| = 3$ m.
Vì $d_2 > d_1$, vectơ tổng hợp cùng hướng với $\overrightarrow{d_2}$, tức là hướng Bắc.
Câu hỏi liên quan
Read the following leaflet and mark the letter A, B, C, or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12.
ANNOUNCEMENT OF CARDIFF BIKE RACE
We are going to take part in the Cardiff Bike Race. Please notice some important details:
• Time: 8 AM ___(7)___ the 22nd of September.
• Team’s Dress Code: You ___(8)___ your normal black T-shirts and shorts because another club uses those colors. Instead, we will wear blue.
• Snack Break: After twenty kilometres, there will be a ___(9)___ spot for snacks with some cake and orange juice.
• Prizes: ___(10)___ latest sport watches.
Let's pedal our way to victory!
While our main aim ___(11)___ people on their bikes, a benefit of the day is the fundraising ___(12)___. This is either direct sponsorship from company logos on the cycling shirts or our cyclists getting sponsored individually per mile.
Theo em, mùi vị của món ăn ngon mẹ nấu cho em ăn là thông tin dạng nào?
Thông thường để xử lý, khử khuẩn nước hồ bơi, người ta sử dụng thiết bị lọc và hóa chất xử lý nước như chlorine. Đây là phương pháp phổ biến, dễ thực hiện và khá hiệu quả. Song nhược điểm của nó là nếu sử dụng quá lượng chlorine cho phép sẽ gây nên các phản ứng ngược, ảnh hưởng đến chất lượng nước và sức khỏe người bơi.
Các nhà khoa học đã nghiên cứu và ứng dụng thành công, ứng dụng phương pháp điện phân muối ăn để tạo ra nguồn khí clo để xử lý nước bể bơi. Đây là phương pháp được đánh giá là hiệu quả vượt trội và thân thiện với môi trường so với các phương pháp xử lý nước bằng hóa chất truyền thống.
Quá trình xử lý nước bể bởi bằng điện phân muối ăn là một chu trình hoàn toàn khép kín. Quá trình thực hiện: Hòa tan muối bể bơi vào nước bể bơi rồi để tan sau một ngày. Khởi động hệ thống lọc nước như sau: Bơm nước cần xử lý qua máy điện phân. Tại đây dung dịch nước muối đã trải qua trình điện phân để tạo ra khí clo, khí hiđro và xút. Những sản phẩm không cần thiết cho quá trình làm sạch sẽ được đưa ra ngoài, chỉ có dung dịch nước đã qua xử lý và khí clo được bơm ngược trở lại bể bơi.
Một gia đình có bể bơi với kích thước là chiều dài 15m, chiều rộng 4,5m và chiều sâu là 1,8m. Gia đình này sử dụng phương pháp điện phân muối NaCl để làm sạch nước trong hồ bơi. Biết rằng hàm lượng của clo cho phép trong nước bể bơi là 0,6 - 1,5 mg/L. Lượng muối NaCl ít nhất theo lý thuyết cần cho vào bể bơi là bao nhiêu, với giả sử hiệu suất quá trình điện phân là 100%?
Read the following leaflet and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 7 to 12.
Boosting Your Confidence
Looking to improve your self-esteem and feel more confident in your daily life? Here’s how you can make positive changes!
Confidence Facts: Studies show that only 35% of people report feeling confident in their abilities, while others ___(7)___ with self-doubt. Building confidence can help improve your performance at work and in social situations.
Tips to Boost Your Confidence:
● Set realistic goals! Start small and ___(8)___ yourself when you reach milestones.
● Surround yourself with positivity! Seek ___(9)___ supportive friends and colleagues to boost your self-esteem.
● Focus on your strengths! ___(10)___ dwelling on mistakes, concentrate on what you do well.
● Practice self-care! Taking time for yourself can ___(11)___ your mood and confidence levels.
● Keep learning! Gaining new skills helps ___(12)___ a sense of accomplishment.
Chuyển số 5610 sang số nhị phân, số lượng bit 0 là
Đối tượng nghiên cứu của sinh học là
Biểu hiện của thương mại thế giới phát triển mạnh là gì?
Ba tỉnh miền Tây Nam Kì bị Pháp chiếm gọn trong 5 ngày (từ 20 đến 24/6/1867) gồm các tỉnh nào?
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 from 29 to 33.
International Women’s Day, celebrated on March 8th, is a time to honor women’s progress and advocate for real change towards gender equality. This day, rooted in a 1908 demonstration where 15,000 women in New York City stood united for equal rights, better pay, shorter hours, and voting rights, has grown into a worldwide movement. Clara Zetkin, at a meeting in 1910, suggested a special day each year to focus on women’s rights, leading to the first International Women’s Day in 1911.
Despite some beliefs that women have equal chances as men, the reality often tells a different story. Girls worldwide face more household duties than boys and are more likely to miss out on school. In many countries, equal education for both genders is not guaranteed, and many girls are married off young, which can force them to end school early, lead to early pregnancy together with other health issues, and increase the chance of domestic violence.
On International Women’s Day, people participate in activities that raise awareness and call for gender equality. Wearing purple, a color of women’s rights history, is common. It is also a day when women are celebrated with gifts and social recognition in some places.
The journey towards full gender equality continues to face challenges. Yet, women’s groups across the globe remain strong and active, with younger women and teenagers adding their voices and energy to the cause. They are organizing, speaking out, and urging a shift in how we view and act towards each other regarding gender roles.
(Adapted from https://learnenglishteens.britishcouncil.org/)
What suggestion did Clara Zetkin make at the 1910 meeting?
These volunteers mainly provided services and help for children with cognitive ___ (impair).
Liên kết kim loại là liên kết sinh ra do
Read the following passage about lifelong learning and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from from 18 to 22.
In today’s rapidly changing world, lifelong learning has become more important than ever. Lifelong learning is essential for personal and professional growth. To stay relevant and competitive in the job market, (18) _________.
One of the key benefits of lifelong learning is personal growth. By learning new things, individuals can boost their self-esteem and confidence. By exploring new subjects and hobbies, individuals can expand their horizons and discover new passions.
(19) _________. By acquiring new skills, individuals can increase their employability. By staying up-to-date with the latest trends and technologies, individuals can increase their value to employers, (20)______. However, lifelong learning can be challenging. (21) _________. Balancing work, family, and personal commitments can make it difficult to find time for learning.
To make the most of lifelong learning, people, especially the young, (22) _________. By breaking down larger goals into smaller, achievable steps, individuals can stay motivated and make progress. By breaking down larger goals into smaller, achievable steps, individuals can stay motivated and make progress.
Khi nói về ảnh hưởng của các nhân tố môi trường đến quá trình quang hợp ở thực vật, phát biểu nào sau đây sai?
Có mấy căn cứ để phân loại vật nuôi ?
Khối thị trường chung Nam Mỹ có tên viết tắt là gì?
Vai trò của phong trào Tây Sơn cuối thế kỉ XVIII là gì?
Những hành vi nào vi phạm pháp luật trong sử dụng Tin học?
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.
The word “complexity” in paragraph 3 is OPPOSITE in meaning to _________.
My sister ___________ very hard for the exam. Unfortunately, she got a bad mark in English.
Đâu là nhận định thể hiện các đặc điểm của thị trường?