ex1: how many main parts are included in an essay ? choose of the pasts to talk about what you are going to write ex2: write an essay of 150 words about how vietnamese people support one another

Dô dúp em vs mng Một vật khối lượng 10 kg bắt đầu chuyển động không ma sát trên mặt phẳng ngang dưới một lực kéo F. Sau một thời gian vật đạt vận tốc 4 m/s. Công của lực kéo là? A. 80J. B. 40J. C. 160J. D. 14J.

Bài 3/liệt kê và tính tổng tất cả các số nguyên x thỏa mãn a/-8<x<8 b/-6<x<4

Trả lời bài 2 nha bài 1 với 3 xong r hihi 😊

Câu l: Tất cả mọi vật trên Trái đất đều chịu tác dụng của trọng hrợng. Nếu vật đứng yên thì có một hực thứ hai tác dụng lên vật và cầnbằng với trọng hrợng. Em hãy chỉ “hực thứ hai" đó trong các trường hợp sau đây. A. Chiếc bàn nằm yên trên mặt đất. B. Chiếc tàu nổi trên mặt nrớc. Câu 2: Một người đi xe mô tô trên đoạn đường ABC với vận tốc trung bình 20 km/h. Biết trên đoạn đường AB người đó đi trong thời gian 10 phút; trên đoạn đường BC người đó đi trong thời gian 20 phút. Tính độ dài quäng đường ABC.

Giúp mình câu d nha mọi người. Mình cảm ơn

The first traffic control device appeared near the British House of Parliament at the intersection of George and Bridge Streets. The device was made in response to the desire by a Select Committee to use railway signals on highways. The device had lights and it used arms which extended outwards. It was operated manually by a police officer. The signal was 22 feet high and crowned with a gas light. The light was called semaphore and had arms that would extend horizontally that commanded drivers to "Stop" and then the arms would lower to a 45 degrees angle to tell drivers to proceed with "Caution". At night a red light would command "Stop" and a green light wouldmean use "Caution".The man behind this new and different invention was John Peake Knight a railroad engineer. The main reason for the traffic light was that there was an overflow of horse-drawn traffic over Westminster Bridge which forced thousands of pedestrians to walk next to the house of Parliament. But Knight's invention was not to last long. After only a month of use the device exploded and injured the police officer who was operating the light. In the first two decades of the 20th century semaphore traffic signals, like the one in London, were in use all over the United States with each state having its own design of the device. One good example was from Toledo, Ohio in 1908. The words "Stop" and "Go" were in white on a green background and the lights had red and green lenses illuminated by kerosene lamps for night travelers and the arms where eight feet above ground. Controlled by a traffic officer who would blow a whistle before changing the commands on this signal to help alert travelers of the change, the design was also used in Philadelphia and Detroit. The example in Ohio was the first time America tried to use a more visible form of traffic control that evolved the use of semaphore. The device that was used in Ohio was designed based on the use of railroad signals. 1. What was the main purpose of making the first traffic control device? …………………………………………………………………………………………………………… 2. What was the light operated manually by a police officer called? ……………………………………………………………………………………………………………… 3. Why wasn't John Peake Knight's invention to last long? ………………………………………………………………………………………………………… 4. How tall were the arms of the traffic lights used in Ohio in 1908? ……………………………………………………………………………………………………………… 5. The Westminster Bridge is in . ………………………………………………………………………………

Yesterday, Carlos went (1)…………..La Tomatina. The festival is held on the last Wednesday of August every year in Bunol, Spain. (2)………….were thousands of people there. T F In the morning, many people tried (3)………..up the pole to get the ham. At 1 a.m, they (4) ……….a jet from the water cannons and the chaos began. Bags of tomatoes from trucks were (5)…………..to the crowds, and they began throwing tomatoes at one another. They all had to wear goggles (6)………..their eyes. After one hour, they saw another jet and stopped (7)……….. , the whole town square (8) ………….red with rivers of tomato juice. Finally, they tried tomato Paella, a (9) ………….Spanish dish. Together with local people and tourists, they enjoyed the (10) …………..food and drinks. 1. A. at B. in C. to D. of 2. A. There B. They C. That D. This 3. A. to climb B. climb C. climbing D. climbed 4. A. see B. saw C. seen D. seeing 5. A. throw B. threw C. thrown D. throwing 6. A. to protect B. protect C. protected D. protecting 7. A. to throw B. throw C. throwing D. thrown 8. A. is B. are C. was D. were 9. A. tradition B. traditional C. traditionally D. traditions 10. A. good B. well C. better D. best

Help me! Mn ơi giúp em vs ạ em đg cần gấp lắm

25% của 120 là: A.25 B.30 C.300 D.480