Con lắc lò xo dao động trên phương ngang với quỹ đạo có độ dài 8 cm; lò xo nhẹ có độ cứng k = 50 N/m. Tinh giá trị cực đại của lực kéo về tác dụng lên con lắc?

Thành phần chính của kẹo mạch nha là

Cho hình chóp S.ABC có \(SA \bot \left( {ABC} \right)\). Khẳng định nào sau đây là đúng?

Nguyên tử lithium tạo nên bởi 3 proton, 4 neutron và 3 electron. Khối lượng lớp vỏ của lithium bằng khoảng bao nhiêu phần trăm khối lượng của cả nguyên tử lithium?

Cho biết: Có mấy loại mạch điều khiển tốc độ động cơ một pha được sử dụng phổ biến?

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions: 

Increasing temperatures worldwide due to global warming has _______ a reduction in sales of tea in the UK recently.

Cho tam giác ABC có \(B = {30^ \circ },C = {45^ \circ },AB = 3\). Tính cạnh AC?

Nhóm chức năng nào sau đây không phải là chức năng của hệ điều hành?

Xác định những từ Hán Việt có trong đoạn văn sau.

Ô nhiễm môi trường hiện đang là vấn đề nghiêm trọng gây nhức nhối dư luận gần đây. Thiên nhiên đang nổi giận và hồi báo lại những hành động tham lam và vô tổ chức của con người. Chỉ trong tuần đầu tiên của năm mới năm 2024, Nhật Bản liên tiếp đón nhận những thảm họa thiên nhiên như sóng thần, động đất và núi lửa phun trào; cùng lúc đó ở phía Tây Nam Trung Quốc xảy ra hạn hán kéo dài, dẫn đến cháy rừng, gây thiệt hại tới 424.000 ha hoa màu. Rồi đây, nhân loại sẽ phải hứng chịu những thiên tai nào khác?

Although noise, commonly defined as unwanted sound, is a widely recognized form of pollution, it is very difficult to measure because the discomfort experienced by different individuals is highly subjective and, therefore, variable. Exposure to lower levels of noise may be slightly irritating, whereas exposure to higher levels may actually cause hearing loss. Particularly in congested urban areas, the noise produced as a by-product of our advancing technology causes physical and psychological harm, and detracts from the quality of life for those who are exposed to it.

Unlike the eyes, which can be covered by the eyelids against strong light, the ear has no lid, and is, therefore, always open and vulnerable; noise penetrates without protection. Noise causes effects that the hearer cannot control and to which the body never becomes  accustomeLoud noises instinctively signal danger to any organism with a hearing mechanism, including human beings. In response, heartbeat and respiration accelerate, blood vessels constrict, the skin pales, and muscles tense. In fact, there is a general increase in functioning brought about by the flow of adrenaline released in response to fear, and some of these responses persist even longer than the noise, occasionally as long as thirty minutes after the sound has ceased.

Because noise is unavoidable in a complex, industrial society, we are constantly responding in the same way that we would respond to danger. Recently, researchers have concluded that noise and our response may be much more than an annoyance. It may be a serious threat to physical and psychological health and well-being, causing damage not only to the ear and brain but also to the heart and stomach. We have long known that hearing loss is America's number one nonfatal health problem, but now we are learning that some of us with heart disease and ulcers may be victims of noise as well. Fetuses exposed to noise tend to be overactive, they cry easily, and they are more sensitive to gastrointestinal problems after birth. In addition, the psychic effect of noise is very important. Nervousness, irritability, tension, and anxiety increase affecting the quality of rest during sleep, and the efficiency of activities during waking hours, as well as the way that we interact with each other.

Based on the passage, how does noise affect psychological and physical health in industrial societies?

Phát biểu nào không đúng với gió mùa?

Read the following passage about Traveling 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.

          Traveling and exploring new places is an exciting way to experience different cultures and expand one’s horizons. Whether it’s a short trip to a neighbouring town or a long journey to a foreign country, stepping out into the world offers numerous benefits. It allows individuals to gain new perspectives, meet diverse people, and create lasting memories. Additionally, traveling can enhance personal growth and provide a sense of adventure and fulfillment.

          One of the key advantages of traveling is the opportunity to learn about different cultures. By immersing oneself in a new environment, travellers can gain a deeper understanding of local customs, traditions, and lifestyles. This cultural exchange fosters mutual respect and appreciation among people from different backgrounds. Moreover, experiencing different cultures can challenge preconceptions and broaden one’s worldview.

          Traveling also promotes personal development. Facing unfamiliar situations and overcoming challenges can boost confidence and adaptability. Travelers often find themselves  navigating new cities, trying unfamiliar foods, and communicating in foreign languages. These experiences can enhance problem-solving skills and resilience. Furthermore, the sense of accomplishment from successfully managing a trip can lead to increased self-esteem and a greater sense of independence.

          Another benefit of traveling is the chance to disconnect from the routine of everyday life. Exploring new places provides a break from the usual responsibilities and stresses. This can be refreshing and rejuvenating, allowing individuals to return home with a renewed sense of energy and perspective. Travel can also foster creativity by exposing individuals to new sights, sounds, and ideas.

          Despite its benefits, traveling can also present challenges. Planning a trip requires time and effort, and unexpected situations can arise. However, these challenges can be viewed as opportunities for growth and learning. With careful planning and a positive mindset, the rewards of traveling far outweigh the difficulties.

In which paragraph does the writer discuss the personal development benefits of traveling?

Read the following passage about Building Understanding Across Nations 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.

In our interconnected world, cultural ambassadors play a vital role in bridging the gaps between different nations and peoples. These dedicated individuals and groups serve as links between cultures, fostering mutual understanding and respect through various activities and programs. Their mission is to showcase their own cultural heritage while learning about and appreciating others, creating pathways for meaningful dialogue and lasting connections across borders.

Cultural ambassadors employ numerous methods to achieve their goals. They organize traditional festivals and art exhibitions that display unique customs, allowing visitors to experience different cultures firsthand. Language exchange programs enable people to communicate more effectively, while cultural workshops teach traditional crafts, music, and dance. These ambassadors also utilize digital platforms to reach wider audiences, sharing stories and traditions through social media and online events that connect people from different corners of the world.

Despite their important work, cultural ambassadors face several challenges in their mission. Stereotypes and prejudices can create barriers to understanding, while language differences sometimes lead to misunderstandings. Limited resources and funding may restrict their activities, and political tensions between nations can complicate their efforts. However, these dedicated individuals persist in their work, believing that personal connections and shared experiences can overcome these obstacles and promote harmony among different communities.

Looking ahead, the role of cultural ambassadors becomes increasingly significant in our global society. Their efforts to build bridges between nations contribute to reducing conflicts and fostering peace. Through their continued dedication to promoting cross-cultural understanding, these ambassadors help create a more inclusive and connected world where differences are celebrated rather than feared. This ongoing process of cultural exchange remains essential for building a future based on mutual respect and cooperation.

In which paragraph does the writer mention what challenges cultural ambassadors face in their work?

Một đặc điểm nổi bật của phong trào 1936 – 1939 ở Việt Nam là gì?

Biết I_o là cường độ âm chuẩn. Tại điểm có cường độ âm I thì mức cường độ âm là

Cho hàm số $f\left(x\right)$ có bảng biến thiên như sau

Giá trị cực đại của hàm số đã cho bằng?

Tập hợp $P=\Big\{ x \in \mathbb{R} \, \big| \, -1< 2x+1 \le 11\Big\}$ được viết lại dưới dạng đoạn, khoảng, nửa khoảng là

Khi nhiệt độ của chất khí lí tưởng tăng lên 4 lần thì tốc độ căn quân phương của phân tử khí tăng lên bao nhiêu lần?

Mĩ đã triển khai “Kế hoạch Mác san” nhằm mục đích gì?

Ai là người đã sử dụng kính hiển vi quang học tự phát minh để quan sát các tế bào trong lát mỏng từ vỏ bần của cây sồi?

Vì sao nói Sử học và di sản có quan hệ mật thiết với nhau?