Một vật có thể tích 40 cm³ và có khối lượng 28 g Khi thả vào nước thì vật nổi hay chìm hoàn toàn. Tính lực đẩy ác- si- mét tác dụng lên vật và thể tích phần chìm trong nước của vật ở trạng thái cân bằng biết trọng lượng riêng của nước là 10000 N/m³

^{Giúp mik vs mik cảm ơn tóm tắt nữa nhá thank}

vieết thuật toán tính tổng các phần tử dãy n số thực được nhập từ bàn phím\

Viết 1 đoạn văn 6-> 8 câu về chủ đề học tập sử dụng ít nhất 2 biện pháp tu từ nói quá

bn nào giúp mik vs mình cảm ơn

viết 1 đoạn văn về thục trạng hút thuốt lá ở việt nam xung quanh em người thân bạn bè với việc hút thuốc lá?

bn nào giúp mik vs mik cần gấp

thank

c) \(11-10x-x^2=-x^2-10x+11=-\left(x^2+10x-11\right)=-\left(x^2+2.5x+5^2-36\right)\)

\(=-\left[\left(x+5\right)^2-36\right]=-\left(x+5\right)^2+36\le36\)

Đẳng thức xảy ra khi : \(x+5=0\Rightarrow x=-5\)

Vậy giá trị lớn nhất của 11 - 10x -x² là 36 khi x = -5. 

180 nha

-Ma'gician: Nhà ảo thuật

-Vege'tarian: Ăn chay

-his'torian: Anh hùng

-pro'cession: quá trình

-cele'bration: Lễ kỷ niệm

- congratu'lation: chúc mừng

-de'cision: phàn quyết

-libra’rian: thủ thư

-at'traction;sức hút

-mu'sician: nhạc sĩ

Travelling can be an expensive hobby but it also is compensates the financial loss with all benefit. If a travelers have interest in life and its manifestations, they can find much to keep themself happy and absorbed. One can definitely find everything that satisfies his intellectual and sensuous cravings.

As a hobby, travelling keeps us busy during leisure time; it is the best method to use time. Till a person breaks from dull routine, physically and mentally; one cannot find satisfaction. Travelling helps us to achieve this break. At a new place, one is curious to know and eager to gather all the unknown information about the place which he has neither read nor heard before he gets thrills and surprises which keep the interest and enthusiasm alive and encourages us to keep our journey on.

While travelling, one comes across a number of people from varied backgrounds and places. By interacting with them, he comes to know about their heritages also. In case one has psychological bent of mind, one increases one’s experience and power to understand others. Understanding human nature is, perhaps, the best part of education. Travelling satisfies all demands of a good hobby – it is absorbing education and refreshment to the mind, body and soul.

Lunar New Year is the most important occasion in Vietnam. Lunar New Year, according to the Vietnamese called Tet Nguyen Dan. "Nguyen" is to start, "Dan" is a new day. "Tet Nguyen Dan" is to start a new year, to welcome Spring with everything in its newest appearance. A new year comes with goodluck and in the mean time, all of the badluck will be gone, together with the passed year. "Tet Ta" (Lunar new year) is affected by Chinese Lunar New Year and East Asia Traditional Circle so that "Tet Ta" comes after New Years Eve. According to the old rule: 3 even years/a month of the Lunar Calendar, so the first day of the year is never before Jan 21st or after Feb 19th. Normally, this day will come from about the end of Jan to mid of Feb. The Lunar New Year lasts for 7-8 days of the passed year and 7 days of the new year.

According to East Asian culture and history of China, the origin of Lunar New Year from Three Sovereigns and Five Emperors and change from time to time. According to folk beliefs, the New Year started from the concept "Thankfully the rain to sunshine", as well as originating from "tiet" (weather) upon under the operation of the universe, expressed in the cycle times the Spring - Summer - Fall - Winter, which, with a very special meaning for an agricultural country like Vietnam. Farmers for this is the occasion to commemorate the gods are related to agricultural land as the god of rain, thunder god, the god of water ... Farmers do not forget to thank the animals which help them farm work like cattle, poultry and they also thank others food crops, food to feed them.