Какую работу А против сил поверхностного натяжения надо совершить, чтобы выдуть мыльный пузырь диаметром d=4см? Поверхностное натяжение мыльного раствора α=0,043 Н/м.
Прямоугольник отсекает верху равнобедренный треугольник со стороной Х. Тогда большая сторона прямоугольника будет 6-Х. Считаем периметр 6-Х + 6-Х + Х + Х = 12
[ на русском языке ] Франция, или официально Французская Республика,- самая большая страна Зарубежной Европы. По площади(551 тыс. кв. км) она более чем вдвое превосходит как Великобританию, так и Германию. К Франции относятся несколько мелких островов в Средиземном море и Бискайском заливе. Население страны составляет 53млн. человек. Франция имеет «заморские департаменты и территории»: Гвиана (Французская), острова Гваделупа, Мартиника, Реюньон, Новая Каледония, Французская Полинезия. [на французском ] France, officiellement la République française, ou, - le plus grand pays en Europe à l'étranger. En termes de superficie (551 mille personnes. Km ².) Est plus de deux fois plus que le Royaume-Uni et l'Allemagne. Pour la France sont plusieurs petites îles dans la mer Méditerranée et le golfe de Gascogne. La population est 53mln. homme. La France a une «départements et territoires d'outre-mer": Guyane (française), la Guadeloupe, la Martinique, la Réunion, Nouvelle-Calédonie, Polynésie française. [ на англиском ] France, officially the French Republic, or - the largest country in Europe and abroad. In terms of area (551,000 people. Km ².) Is more than twice as much as the UK and Germany. For France are several small islands in the Mediterranean Sea and the Bay of Biscay. The population is 53mln. rights. France has a "departments and overseas territories" Guyana (French), Guadeloupe, Martinique, Reunion, New Caledonia, French Polynesia
Places of Interest in ФранцииFrance is one of the most beautiful and romantic countries in the world. It’s the place where many couples try to spend their honeymoon. The capital of the country is Paris. The city itself is regarded as the place of interest. Its major sights are considered to be the national symbols of France, for example, the Eiffel Tower or the Cathedral of Notre Dame, the Elysian Fields or the Louvre. Other Parisian sights include the Triumphal arch, Montmartre – the highest hill in the city, Moulin Rouge cabaret, the Temple of Glory – the place where all great men of France are buried, and finally the Sorbonne – one of the largest and most famous universities in the world. Although Paris is the main city of France, it’s not the only place where attractions can be found. There are lots of historic cities, interesting landmarks, museum, cathedrals, castles, theme parks in the country. One of the most beautiful architectural sights is the Palace of Versailles. This outstanding building is situated outside of Paris and it used to be the home for French kings and queens. The Palace is surrounded by magnificent gardens and fountains. Another tourist destination is Arles. It is an ancient town on the Rhone River which features a full spectrum of possible sights. Tourists can attend La Chamber de Vincent there, which used to be the house of Vincent Van Gogh, a Roman amphitheatre which was built in the first century BC, the Theatre Antique where summer concerts are held and other interesting places. The visitors of France are also fond of the region Provence. They say you can see the fields of lavender, vineyard valleys, lots of flamingos and sycamores in this region. Main sights of Provence include Pont du Gard – ancient Roman bridge, the Cathedral St-Sauveur, the studio of Paul Cezanne, and other places of interest. The Lyon is the capital of gastronomy in France. People say that it offers the best French cuisine. Besides, the city of Lyon is full of beautiful constructions. The list of French sights is endless. Almost all cities in this country are worth visiting. I would love to visit France someday and see all these sights with my own eyes.
Считаем периметр 6-Х + 6-Х + Х + Х = 12