Hình vẽ là đồ thị phụ thuộc thời gian của li độ dao động điều hòa. Chu kì dao động là bao nhiêu giây?
Đáp án:
Hình vẽ là đồ thị phụ thuộc thời gian của li độ dao động điều hòa. Chu kì dao động là bao nhiêu giây?
|
Đáp án: |
|
|
|
|
Câu hỏi liên quan
Ý nào dưới đây không đúng khi nói về vấn đề đạo đức kinh doanh?
Để nâng cao hiệu quả quang hợp và năng suất ở cây trồng, một số nhà công nghệ sinh học cho rằng cần nâng cao hiệu quả của quá trình cố định CO2 ở cây trồng. Để đạt được điều đó, định hướng nghiên cứu nào dưới đây là phù hợp nhất?
Phân tích, đánh giá một truyện kể: chủ đề, những nét đặc sắc về hình thức nghệ thuật thuộc kiểu bài gì?
Cho thông tin sau:
Tình trạng thoái hóa đất, sạt lở đất ở khu vực miền núi, bờ sông, ven biển; mặn hóa đất trồng trọt có xu hướng gia tăng cả về số lượng, mức độ và quy mô, ảnh hưởng đến sự an toàn và hoạt động sản xuất của người dân.
(Nguồn: Tạp chí Con số & Sự kiện)
Nhận định nào dưới đây là đúng/sai?
- Trong mặt phẳng với hệ tọa độ
, diện tích 
của hình phẳng giới hạn bởi đồ thị hàm số 
, trục hoành và hai đường thẳng 
được xác định bằng công thức Vỏ Trái Đất ở lục địa có độ dày là
Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
I’m sure that they had practiced hard for the games as they won a lot of medals.
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.
My father was an enthusiastic traveller, but as he got older, he increasingly suffered from what he called “travel fever,” a vivid term for the acute anxiety felt before a journey, essentially due to uncertainty about all the things that could go wrong. Sadly, this eventually stopped him from going on holiday. Then I, too, started to suffer similar apprehension, so I consulted a psychotherapist. She recommended a small piece of cognitive behavioural therapy, which involved acknowledging the mental and physical symptoms of anxiety, but telling myself that these were essentially indistinguishable from feelings of excitement about the prospect of a journey. This reframing of my feelings has been reasonably effective – it’s one way of dealing with uncertainty.
It’s not just the uncertainty of travel that we all have to face. None of us knows what is going to happen, or what is currently going on outside our immediate knowledge, or the vast majority of what has happened in the past. Uncertainty has been called the “conscious awareness of ignorance,” and there is a lot we are ignorant about. We must navigate through life without complete information, and this fundamental uncertainty is an inescapable aspect of human existence.
We all have to live with this uncertainty and, as a statistician, it’s been my job to try to analyse data and assess some of the risks we face. (I)But some deal with uncertainty with more equanimity than others. (II) Psychological studies, as well as our own experience, reveal a wide variation in people’s responses, including those that are cognitive (how we think), emotional (how we feel), and behavioural (what we do). (III)For example, when faced with uncertainty, do you deny it or acknowledge it, does it put the wind up you or make you courageous, do you try to avoid it or approach it?(IV)
Of course, your response may depend on the context, just as an individual’s appetite for risk-taking can vary across different areas of their lives. I have known people who seemed to take huge physical risks, yet were very cautious with money. Numerous scales have been developed to measure how well people can deal with uncertainty, based on responses to statements ranging from “Unforeseen events upset me greatly” to “When it’s time to act, uncertainty paralyses me.” Those who score highly, and find it difficult to tolerate uncertainty, may also be at increased risk of clinically significant anxiety and depression.
The word “these” in paragraph 1 refers to:
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 TRUE according to the passage?
Trong Google Drive, thao tác nào được thực hiện để tải tệp lên ổ đĩa trực tuyến?
Văn bản được kể theo ngôi thứ mấy?
Phát biểu nào dưới đây là sai về vai trò của bảo hiểm?
Biểu thức \(A=\text{cos}{{20}^{\circ }}+\text{cos}{{40}^{\circ }}+\text{cos}{{60}^{\circ }}+...+\text{cos}{{160}^{\circ }}+\text{cos}{{180}^{\circ }}\) có giá trị bằng
Kí hiệu là tập hợp các cầu thủ trong đội bóng rổ, là mệnh đề chứa biến: " cao trên 180 cm".
Mệnh đề " , " khẳng định rằng
Read the following passage about Preserving Today's Soundscapes for Future Generations 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.
Sonic time capsules save today's sounds for future people. Scientists capture everyday sounds like streets, birds, and children playing in parks around the world. These recordings help us remember our world before changes. Cities are losing unique sounds as life becomes similar everywhere. Old machines, music, and natural sounds might disappear if not saved. Many important cultural sounds are already lost forever because nobody thought to record them when they still existed.
Sound collectors use microphones to record in different places. They visit forests, oceans, cities, and villages to capture soundscapes throughout different seasons and times of day. They store sounds in digital libraries for years. Museums have rooms for listening to past sounds. These experiences help people understand history in ways books cannot. Some researchers travel to remote locations to record indigenous languages and traditional ceremonies before they vanish from our collective memory.
Climate change is changing world sounds. Melting glaciers, endangered animals, and disappearing languages need saving before they're gone. Researchers believe future people will want to know how our world sounded. These capsules will be important records, like photographs. Scientists study how sounds affect human health. The sounds of nature can reduce stress and improve mental health, which makes preserving natural soundscapes even more important for future generations who may live in highly urbanized environments.
Community projects invite people to record daily sounds. Children learn to listen carefully to the world around them and identify sounds that matter to their community. Old people share recordings from their childhood. People feel emotions when listening to these collections. Artists create music using everyday recordings. These projects help communities protect special sounds for the future. Some cities now have sound preservation policies that protect unique acoustic environments just as they would protect historic buildings or natural landscapes from development.
Which of the following is NOT MENTIONED as a type of sound being preserved in sonic time capsules?
Các nhân tố nào đã ảnh hưởng đến lượng cầu hàng hóa và dịch vụ trong trường hợp dưới đây?
"Trong bối cảnh thị trường dầu mỏ thế giới biến động làm giá xăng dầu tăng lên, với mức thu nhập không đổi, nhiều người tiêu dùng ở thành phố đã phải cân nhắc khi sử dụng phương tiện giao thông. Thay vì sử dụng phương tiện ô tô, xe máy cá nhân hoặc taxi, nhiều người đã lựa chọn dùng phương tiện công cộng như xe buýt".
Mỗi học sinh của lớp 10A đều thích môn Toán hoặc môn Tiếng Anh, biết rằng có 30 học sinh thích môn Toán, 25 học sinh thích môn Tiếng Anh và 15 em học sinh thích cả hai môn. Hỏi lớp 10A có tất cả bao nhiêu học sinh?
Nam, nữ bình đẳng trong việc tự ứng cử và được giới thiệu ứng cử đại biểu Quốc hội, đại biểu Hội đồng nhân dân - đó là quy định pháp luật về bình đẳng giới trên lĩnh vực nào?
Nhóm cây trồng nào sau đây phân loại theo chu kì sống?
Tiện ích "Defragment" của hệ điều hành có tác dụng gì?
