Một bánh xe quay đều 100 vòng trong 2s. Chu kì quay của bánh xe là

Một ấm nhôm có khối lượng 400 g chứa 0,6 lít nước đang ở nhiệt độ 30 ^oC. Biết nhiệt dung riêng của nhôm và nước lần lượt là c₁ = 880 J/kg.K; c₂ = 4200 J/kg.K. Nhiệt lượng tối thiểu để đun sôi nước trong ấm là

Tình huống nào dưới đây đã vi phạm quyền và nghĩa vụ bảo vệ Tổ quốc của công dân?

Read the following passage about education in Nepal 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. 

Fashion in the 1960s reflected the cultural and political upheaval of the time. The hippie and counterculture movement gave rise to accessories like Pocahontas-style headbands and medallions worn around the neck. Hippies wore long, loosely fitting clothing, often in natural fabrics. Hemlines rose as Mary Quant popularized the miniskirt and hot pants in her lines for JC Penney. And mod fashion, with brightly colored space-age geometric patterns, shift dresses and colored tights became the mainstream. Both miniskirts and mod-shift dresses were worn with knee-high go-go boots.

[A] During the 1970s, the loose-fitting hippie clothes of the prior decade gave way to exotic fabrics and bell-bottom jeans for men and women. Hemlines continued to rise and hot pants continued their popularity, reflecting the flashy style of the decade. However, the 1970s also saw the popularity of a longer hemline, from mid-calf to ankle-length. [B] Women wore peasant-style clothing, especially blouses with off-the-shoulder necklines and lace trim, with their jeans or skirts. [C] Disco fashion emerged, featuring bright patterns and tightly fitting clothing meant to show off the body. Platform shoes elevated their wearer, male or female, anywhere from two to four inches or more. [D]

The 1980s saw another fashion upheaval. Angst-ridden punks wore Dr. Marten and steel-toed army boots, chains, tartan patterns, and bondage pants. Punks focused more on their hair during this period, dying, teasing and chopping their hair into asymmetric styles that seemed to defy gravity. Women—and men—experimented with heavy eyeliner in a variety of colors. Women wore neon colors, jelly shoes, tight jeans, leggings, leg warmers and oversized sweatshirts. Menswear-inspired looks also became popular for both sexes. Men wore ‘power suits,’ named so for their price, which made these suits a reflection of the wealth of the wearer. Women’s jackets featured big shoulder pads that made the shoulders appear higher and larger, similar to the male silhouette.

1990’s fashion was far more subdued than the garish, wild styles of the 1980s. Bands like Nirvana influenced the grunge look, which featured rock-concert tee shirts under plaid flannel shirts, jeans and long, greasy hair. Overalls were worn by both sexes, either with one or both shoulder straps unhooked. The punk style of the 1870s and 1980s evolved into the goth fashion trend, which featured black clothing, black boots and studded bracelets in the style of bands like Nine Inch Nails and Marilyn Manson.

Which of the following best expresses the essential information in the underlined sentence in paragraph 3?

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

Human life expectancy _______ greatly in the past few decades since scientists identified the genes responsible for disease resistance.

Trong một đợt phong trào “Thanh niên tình nguyện” có 5 học sinh khối 12, 4 học sinh khối 11 và 3 học sinh khối 10, được chia làm nhiệm vụ ở 4 thôn khác nhau M, N, P, Q (mỗi thôn 3 học sinh). Tính xác suất để thôn nào cũng có học sinh khối 12 và học sinh khối 11?

Read the following passage about humanoid robots 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 18 to 22.

The average life expectancy in Vietnam is approximately 71 years for men and 76.4 years for women. This gender disparity is often attributed to differences in lifestyle and health-related behaviors. Women generally exhibit healthier habits, such as consuming less alcohol, smoking less frequently, maintaining a balanced diet, and paying greater attention to their physical well-being.  However, life expectancy is shaped by a variety of additional factors  . For instance, individuals residing in economically disadvantaged regions often face limited access to healthcare services, nutritious food, and opportunities for rest or physical activity , which can significantly reduce their lifespan. Educational attainment also plays a crucial role. Research indicates that individuals with higher education levels tend to live, on average, three years longer than those without a university degree. This is likely due to improved socio-economic conditions associated with higher education, such as better employment prospects and access to resources that promote health. Furthermore, benefiting from advances in medicine and medical technology people can lead a healthier and safer life, which results in enhanced life expectancy. Ultimately, lifestyle choices are critical determinants of longevity. It is crucial for individuals to adopt healthy habits, such as maintaining a nutritious diet that provides essential nutrients, and avoiding harmful behaviors like smoking, which brings about a wide range of both physical and mental changes in people’s health, leading to a longer expectancy.

Tập nghiệm của bất phương trình \(2{{x}^{2}}-14x+20<0\) là

Điểm chết trên là:

Thành phần nào quan trọng cấu tạo nên thành tế bào của nhiều loài nấm?

Đâu không phải là phương pháp thường được áp dụng trong nghiên cứu sinh học?

Ở mặt chất lỏng, tại hai điểm S₁ và S₂ có hai nguồn dao động cùng pha theo phương thẳng đứng phát ra hai sóng kết hợp có bước sóng 1cm. Trong vùng giao thoa, M là điểm các S₁ và S₂ lần lượt là 7cm và 12cm. Giữa M và đường trung trực của đoạn thẳng S₁S₂ có số vân giao thoa cực tiểu là:

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.

Discover the Future of Dining at Viet Organic Garden Restaurant!

At Viet Organic Garden Restaurant, we offer a (7)______of fresh, organic dishes designed to meet the growing demands of modern consumers. As the world experiences a (8)_______toward healthier, eco-friendly lifestyles, we are proud to provide a dining experience that prioritizes sustainability and wellness.

Unlike the other restaurants that depend on processed foods, we source our ingredients directly from local farmers. This ensures that our supply is never (9)______and allows us to deliver meals rich in flavor and nutrition. (10)______ ethical sourcing and environmentally friendly practices, we bring quality and care to every plate.

When you place your (11)______at Viet Organic Garden Restaurant, you can trust that each dish is made with love and care. Join us and be part of this exciting movement. Whether you're looking for a cozy weekend meal or a refreshing take on dining, Viet Organic Garden Restaurant stands apart from the (12)______ options in the market as a leader in sustainable and healthy dining.

Đường thẳng \(d\) đi qua điểm \(M\left( { - 2;1} \right)\) và vuông góc với đường thẳng \(\Delta :\left\{ \begin{array}{l}x = 1 - 3t\\y = - 2 + 5t\end{array} \right.\) có phương trình tham số là?

Cho các hoạt động trong quá trình tiêu hóa ở động vật chưa có cơ quan tiêu hóa như sau:

(1) Các ezyme từ lysosome vào không bào tiêu hóa, thủy phân các chất hữu cơ có trong thức ăn thành những chất đơn giản mà cơ thể có thể hấp thụ được.

(2) Lysosome gắn vào không bào tiêu hóa.

(3) Màng tế bào lõm vào bao lấy thức ăn.

(4) Chất dinh dưỡng khuếch tán vào tế bào chất.

(5) Hình thành không bào tiêu hóa.

(6) Chất thải, chất bã được xuất bào.

(7) Các hoạt động trên được diễn ra theo trình tự là:

Đâu là ý đúng: Tiêu chí thứ hai trong đánh giá công nghệ là gì?

Phân tử S₈ có 128 electron, hỏi số hiệu nguyên tử của lưu huỳnh (S) là bao nhiêu?

Tác dụng vào vật 2 kg đứng yên một lực không đổi 10 N làm vật trượt theo phương ngang. Sau 2 giây vật có vận tốc 6 m/s, lấy g=10 m/s². Hệ số ma sát giữa vật và sàn là \(\mu \).

Mark the letter A, B, C or D on your answer sheet to indicate the correct option that best fits each of the numbered blanks from 27 to 31.

Speech is one of the most important ways of communicating. It consists of far more than just making noises. To talk and also (27) ___________ by other people, we have to speak a language, that is, we have to use combinations of sounds that everyone agrees to stand for a particular object or idea. Communication would be impossible (28) _________________. Learning a language properly is very important. The basic vocabulary of English is not very large, and not only about 2,000 words are needed to speak it quite well. But (29) ________________, the more precise you can be about their exact meaning. Words are the main thing we use in communicating what we want to say. (30) ________________. (31) _______________ of voice can express many emotions and show whether we are pleased or angry, for instance.