Điện áp giữa hai đầu của một điện trở R là \(u = {U_0}\cos \omega t,\) cường độ dòng điện chạy qua nó là

Cho sơ đồ phản ứng: \(\mathrm{Fe}+\mathrm{H}_{2} \mathrm{SO}_{4}\) đặc nóng \(\rightarrow \mathrm{Fe}_{2}\left(\mathrm{SO}_{4}\right)_{3}+\mathrm{S}+\mathrm{H}_{2} \mathrm{O}\). Sau khi cân bằng với hệ số nguyên tối giản, hệ số của \(\mathrm{H}_{2} \mathrm{SO}_{4}\) trong phản ứng là

Đâu là những loại cây ngày ngắn?

Cho biết kết quả khi chạy đoạn chương trình sau:

s = 0

for i in range(3):

s = s+2*i

print(s)

Tại sao trước khi ủ để hạt nảy mầm, người ta thường ngâm hạt trong nước một thời gian?

Nội dung nào sau đây là hoạt động đối ngoại của Nguyễn Ái Quốc trong giai đoạn 1918 -1920?

Các văn bản pháp luật khác khi ban hành phải đảm bảo tiêu chí nào so với Hiến pháp?

Rearrange the sentences to make meaningful sentences

What/ can/ to/ you/ parents/ do/ a/ hand/ give/ with/ your/ the housework?

Read the following passage about the The Importance of Social Media in Modern 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.

In the 21st century, social media has become a crucial element of everyday life[I]. Platforms such as Facebook, Twitter, Instagram, and TikTok link individuals around the world, [IV]. Although some may critique social media for promoting negativity, it is important to acknowledge its numerous positive effects on society[III]. This essay will delve into the importance of social media, its influence on shaping public perception, and the challenges it poses.[II]

One of the primary benefits of social media is its ability to foster communication and connection. People can maintain relationships with friends and family, regardless of geographical barriers. This aspect is particularly vital for those who live far away from loved ones. For example, a student studying abroad can easily share their experiences with family through posts, photos, and video calls. Furthermore, social media enables individuals to connect with like-minded people and build communities around shared interests or causes. Activist groups, for instance, often use social media platforms to rally support for important issues, raising awareness and mobilizing action more efficiently than traditional methods.

Moreover, social media serves as a powerful tool for information dissemination. News spreads rapidly through these platforms, allowing individuals to stay informed about current events. During emergencies, such as natural disasters, social media can provide crucial information in real time, helping people stay safe and informed. However, this rapid dissemination of information also raises concerns about the accuracy and reliability of the content being shared. Misinformation can spread just as quickly as legitimate news, leading to confusion and mistrust.

Despite the challenges posed by misinformation, social media plays a significant role in shaping public opinion. People often turn to these platforms to voice their opinions and engage in discussions on various topics. For instance, political debates and social movements frequently gain traction through social media, allowing individuals to express their views and influence others. This democratization of discourse can empower marginalized voices and facilitate social change. However, it is crucial to approach online discussions critically, as echo chambers can form, reinforcing existing beliefs rather than encouraging open dialogue.

In conclusion, while social media presents challenges such as misinformation and polarized discussions, its positive contributions to communication, information dissemination, and social activism cannot be overlooked. As society continues to evolve, it is essential to harness the potential of social media while being mindful of its pitfalls. By promoting responsible use and critical thinking, we can maximize the benefits of social media and foster a more connected and informed society.

Which of the following can be inferred from the passage?

A human-like robot that can drive a car could one day be used as a chauffeur, though its creator admits that this may take at least 50 years.

Most driverless cars work very differently to a human driver, using artificial intelligence and custom mechanical systems to directly move the steering wheel and pedals. This approach is much more efficient and simpler than using a robot to drive, but it is also specially made for each particular car.

Kento Kawaharazuka at the University of Tokyo and his colleagues have developed a human-like robot, called Musashi, that can drive a car in the same way as a human. It has a human-like “skeleton” and “musculature”, as well as cameras in each of its eyes and force sensors in its hands and feet. Artificial intelligence systems work out what actions are needed to drive the car and react to events that often happen on roads such as traffic lights changing colour or a person stepping in front of the car. The robot can only perform a limited range of driving tasks at present, such as going forward in a straight line, taking a right- hand turn, and moving at speeds of around five kilometres per hour on non-public roads. “The speed of the pedal or the velocity of the car is not high. Also, the handling of the car is not fast compared to human beings,” says Kawaharazuka.

It seems that a robot at the controls of a car, operating in real traffic conditions and in total safety, is not something we are likely to see soon. As mentioned earlier, it could be decades before a robot could really step into the driver’s seat.

What is mentioned about driverless cars in paragraph 2?

Một con lắc lò xo gồm một vật nhỏ khối lượng m và lò xo có độ cứng k. Con lắc dao động điều hoà cới tần số góc là:

Xác định ý đúng: Quy trình sản xuất phân bón vi sinh phân giải chất hữu cơ có bước nào?

Phân tử nào sau đây khác so với các phân tử còn lại?

Trong tự nhiên nitrogen có hai đồng vị là ¹⁴N (99,63%) và ¹⁵N (0,37%). Nguyên tử khối trung bình của nitrogen là

Quyết định xử phạt vi phạm hành chính về lĩnh vực đất đai và bảo vệ môi trường đối với công ty TNHH K về hành vi gây tiếng ồn vượt chuẩn kĩ thuật, thuê quyền sử dụng đất nông nghiệp để đầu tư kinh doanh khi chưa đủ điều kiện. Quyết định trên thuộc loại văn bản pháp luật nào?

Từ năm 1960 đến năm 1973, kinh tế Nhật Bản có biểu hiện nào sau đây? 

 Đỗ Phủ sống ở thế kỉ nào?

Đặc điểm nào sau đây không thuộc khởi nghĩa Phan Bá Vành (1831 – 1827)?

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 of text in each of the following questions from 13 to 17.

Hi Dan,

a. It’s a great decision, but are you ready for the responsibility?

b. However, having a pet can really improve your mental life.

c. I've heard that you were thinking of adopting a puppy from the shelter.

d. You should consider this thoroughly, and I'm excited to know your choice.

e. You will have to feed, walk, and play with it every day. Talk to you soon,

Mike

Có mấy nguyên tắc trong thiết kế kĩ thuật?