Một quả cầu kim loại (chưa nhiễm từ) được treo bằng một sợi dây. Khi đưa cực bắc của một thanh nam châm lại gần, quả cầu bị nam châm hút rất mạnh. Sau đó, đảo ngược nam châm và cực nam của nó được đưa lại gần quả cầu. Quả cầu sẽ bị 

Số vị trí biểu diễn các nghiệm của phương trình \(\text{sin}\left( 2x+\frac{\pi }{3} \right)=\frac{1}{2}\) trên đường tròn lượng giác là

Nhà Ông Năm là chủ một trang trại có 10000 con gà. Phương thức chăn nuôi của ông Năm đó là?

Nguyên tử nguyên tố carbon (C) có 6 proton. Số electron trong nguyên tử carbon là

Nội dung nào dưới đây thể hiện vai trò của thuế?

Chữ người tử tù được trích trong tập truyện nào dưới đây?

Để chuẩn bị cho các tiết mục văn nghệ, lớp 10B cử ra 12 bạn tham gia tiết mục múa và 7 bạn vào tiết mục hát. Biết rằng có 3 bạn tham gia cả hai tiết mục và 22 bạn không tham gia văn nghệ. Số học sinh lớp 10B là?

Read the following passage about The Longitude Prize and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions

     On a stormy night in 1707, four ships struck rocks off the south coast of England and sank. [I] One thousand, four hundred sailors were drowned. [II] The ships had crashed because they had no way of knowing how far they had travelled in a particular direction; they could not calculate their longitude, which required accurate time measurement. [III] In such difficult circumstances, they believed that the best response to the disaster was a competition: the Longitude Prize. [IV]

     The Longitude Prize was no ordinary competition. To win it, someone had to find a way of calculating how far a ship had travelled east or west from its point of departure. Geniuses such as Sir Isaac Newton had failed to find a solution, so to ensure the interest of Britain’s greatest scientific minds, the government offered a prize of £20,000 — the equivalent of £2.6 million in today’s money. But to everyone’s surprise, it wasn’t a famous academic who solved the problem, but an unknown carpenter.

     When John Harrison wasn’t working with wood, he was making clocks. An accurate clock would allow sailors to calculate their position, but at the time it was thought impossible to create a mechanical clock that could work on a ship. The movement of the sea and the changes in temperature destroyed the delicate parts. However, after three frustrated attempts, Harrison’s fourth sea clock, H4, finally triumphed. Its mechanics were so good that the H4 worked better than most clocks on land.

   The Longitude Prize and Harrison’s success generated a lot of interest in the 18th century, but it was soon forgotten. However, in 2013, the British government created a new Longitude Prize, offering £10 million to the person who could solve a great challenge to humanity. An enthralled public then took part in a TV programme where viewers chose one challenge from a list of six for scientists to focus on. The question now is, will someone be able to solve it just as well as Harrison solved the challenge presented to him?

Where in paragraph 1 does the following sentence best fit?
It was the most serious in a series of accidents at sea, and a stunned British government decided to act

Giá trị nhỏ nhất của hàm số $$y=\dfrac{x-1}{x+1}$$ trên đoạn $\left[ 0;3 \right]$ 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.

The noise next door didn’t stop until midnight.

Nước nào sau đây tham gia Liên bang Cộng hòa xã hội chủ nghĩa Xô viết năm 1922?