Мальчик, движущийся на скейтборде со скоростью 0,5 м/с, спрыгивает с него со скоростью, равной 1 м/с и направленной против хода скейтборда. Масса мальчика равна 30 кг, а масса скейтборда – 10 кг. С какой скоростью стал двигаться скейтборд после того, как мальчик спрыгнул с него.

участниками областной олимпиады по русскому языку стали 76 человек,что составило четвертую часть всех учеников олимпиад за год. Найдите, сколько учеников приняли участие в областных олимпиадах в этом году.

мини сочинение на тему "электричество в быту"

B9
Прочитайте вопросы 1 – 5 и рекламные объявления A – F о музеях в Вашингтоне, столице США, и установите соответствие между вопросами и рекламными объявлениями. В каждом тексте вы найдете ответ только на один вопрос..В задании один текст лишний.

Which museum


1.
is more than a century old?

2.
is named after a man who loved Asian art?

3.
gives an idea of what George Washington looked like?

4.
collects things of working class people?

5.
gives its visitors a chance to travel in space?

A---The Mount Vernon Museum gives an idea of George and Martha Washington's life. On display are personal things of America's first president and military equipment. One can also see porcelain and silver used at Mount Vernon.

A bust of George Washington modeled at Mount Vernon by the French sculptor Jean Houdon, is also exhibited. The bust is thought to look like the model. Washington is depicted as a general, the founder of the state.

B--- In the Freer Gallery of Art visitors will find one of the finest collections of Chinese and Japanese art in the western world. A Detroit industrialist, Charles Lang Freer, was fond of Oriental art. During his trips to London he began collecting it. Later he gave his private collection to the museum which had been opened a century before.

C--- The Renwick gallery shows American art from the 19th to the 21st centuries. The collection has works of modern American artists in glass, ceramics, metal, and wood. The building, begun in 1859, was Washington, D.C.'s first art museum. It is named after the building's architect, James Renwick.

D ---This museum is filled with the sounds, sights and smells of the life of this big city in the past.
The museum tells about common people who worked in industries, trades and services, looking at their work and pastimes and uses reconstructed scenes, objects and photographs to bring their story to life.

E--- This Museum is so much fun for kids and grown-ups. It tells the story of flight, from the first balloons to our current exploration of the Universe. It is the home of the first airplane. Only in this museum visitors can make a tour of the Universe and walk through a skylab orbital workshop.

F--- 
The attractive and unusual architecture of the Hirshhorn Museum sets it apart from the other museums on the Mall. Looking like a sculpture itself, the Hirshhorn Museum is a tall cylinder. The museum is named after an American collector of modern art.

Какие отрасли во Франции и Великобритании являются отраслями специализации? Какие природные факторы определили сходство и различия в отраслевом составе экономики двух стран? Плз помогите....