Предмет: Математика, автор: westa8790

какое расстояние стола между двумя поездами выжившими в противоположных направлениях Из двух городов расстояние между которыми 20 км ч через 4 часа Скорость одного поезда 70 км ч скорость другого 80 км ч

Ответы

Автор ответа: tyushakashkin95

Ответ:https://znanija.com/task/11777946

Пошаговое объяснение: зайди по ссылке

Предыдущий вопрос

Следующий вопрос

Интересные вопросы

Предмет: Русский язык, автор: Аноним

родственное слова к слову акваланг

2 года назад

Предмет: Русский язык, автор: frolovamarija

как заменить сходным по значению словом знаменитый писатель,с орфограммой буквой непроизносимых согласных в корне?

2 года назад

Предмет: Английский язык, автор: Sharf1k

Перевод текста. Помогите.

Historians label the period in Europe between the 14th and 16th centuries as the
‘Renaissance’ – a period of rebirth.
In the Renaissance Period the magnitude of scholarly and artistic activities was
greatly enhanced in Europe. New knowledge was acquired which gave rise to new
technologies, and the Industrial Age soon followed. The Industrial Age developed as
mankind learned to harness the energy created from the burning of hydrocarbons,
such as coal and petroleum. Mechanics emerged as a new science in universities.
Except for the magnetic compass, electric and magnetic energy remained a curi-
osity, having little practical application, until the invention of the battery by Alessan-
dro Volta in 1800. This invention gave scientists a new tool with which to experi-
ment, and soon the laws of electricity and magnetism were discovered.
In 1831 Faraday discovered that rotating a conductor in a magnetic field gave
rise to an electric potential, and the electric generator and motor became a reality.
However, the development of the electric power industry was really spurred by the
invention of a practical incandescent electric light bulb in 1879 by Thomas Edison.
The electrification of cities soon followed. Alternating current and the transformer
allowed electric energy to be transported over large distances, and electrical engineer-
ing as a profession was born. The first professional society for electrical engineers
was founded in 1884.
The discovery of the laws of electricity and magnetism in the 1800s also gave
birth to two new information industries, the telegraph and telephone industries. How-
ever, the electric power industry remained a dominant force in the first half of the 20th
century.
Two new non-electrical information industries were also created in the 1800s through advances in the chemical sciences. The photographic film process was pefected and the photographic industry was born soon to be followed by the motion picture industry.

2 года назад

Предмет: История, автор: Лололоумктте

с какой целью князь Владимир решил ввести христианство на Руси

8 лет назад

Предмет: Алгебра, автор: Вакулович2001Ксюша

знайдіть найменший додатковий корінь рівняння
1+cos2x=(cos2x+sin2x)^2

8 лет назад