Два математмчні маятника одночасно починають коливання.За той самий час перший маятник здійснюе 20 коливань,а другий 10 Якою є довжина першого маятника якщо довжина другого 1м​

Магеллан совершившей первое известное кругосветное путешествие. Открыл пролив, позже названный его именем, став первым европейцем, проследовавшим по морю из Атлантического океана в Тихий.
Элькано-В 1519 году он, в качестве кормчего, принял участие в кругосветной экспедиции Фернана Магеллана. Смерть не пощадила и самого Магеллана, в 1521 году погибшего на Филиппинах во время стычки с туземцами. Тогда-то Элькано и принял на себя командование экспедицией - точнее единственным кораблем с полумертвым от истощения и болезней экипажем.

school is where we learn . Everyone remembers their first day at school. Today is the first of September. Exciting, festive, beautiful day. It was from that day that I understood the word "school" and how difficult it is to learn in the world of knowledge. Since then, every day at school has been unique for me. I found a lot of friends here. At each break, we communicate, and at each lesson you will learn more and more new and interesting things. The uniqueness of my school is that only we have such wonderful, kind and sensitive teachers who are able to find an approach to each student. In each lesson, they put a large part of their soul into us. Without knowledge, a person today cannot live in any country in the world. An educated person is valued anywhere in the world. Therefore, our teachers help each child to learn new material not only for good grades, but also for high-quality knowledge.

Объяснение:

school is where we learn . Everyone remembers their first day at school. Today is the first of September. Exciting, festive, beautiful day. It was from that day that I understood the word "school" and how difficult it is to learn in the world of knowledge. Since then, every day at school has been unique for me. I found a lot of friends here. At each break, we communicate, and at each lesson you will learn more and more new and interesting things. The uniqueness of my school is that only we have such wonderful, kind and sensitive teachers who are able to find an approach to each student. In each lesson, they put a large part of their soul into us. Without knowledge, a person today cannot live in any country in the world. An educated person is valued anywhere in the world. Therefore, our teachers help each child to learn new material not only for good grades, but also for high-quality knowledge.