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I) What are the most important inventions or innovations for you at work? And at home? What do you know about their inventors?

2) Do you often listen to the radio? Why so? What do you know about the inventor of the "clockwork radio"? Read the first paragraph of the text and check your answers.

CLOCKWORK RADIO"

Trevor Baylis is an inventor. In 1991, he heard about the problem of bringing health information to people in rural Africa, Radio was the best way but people had no electricity and could not pay for expensive batteries. So he invented a radio that doesn't need mains power or batteries. Instead, it consists of a spring, gears, and a small generator. So how does his clockwork radio actually function? As you turn the handle on the side of the radio, you wind up a spring, It's the same kind of steel spring used in car safety belts. It takes 60 turns to wind up the spring fully.

When the spring starts to unwind, the gears engage. There are three 1:10 step-up gears. The last step-up link is a pulley. Pulleys run more quietly than gears so this reduces noise. Each time the first gear turns, the generator tums one thousand times. As it tuns, it generates electricity-a voltage of 3V at about 30 mA. The spring has enough power to run the radio for 30 minutes before you have to wind it up again.

More than two milion clockwork radios are in use all over the world.

Trevor Baylis has also invented an electric shoe. It charges batteries as you walk.

30*x-69=4731 Помогите пожалуйста за лето забыл с объяснением . Плиз

Две прямые перетираются под кутом 30°. Знайдите 3 других Кута

Маша и Таня по очереди выписывают на доску цифры шестизначного числа . Сначала Даша выписывает первую цифру , затем Таня вторую , и так далее . Таня хочет , чтобы полученное в результате число делилось на 3 , а Даша хочет ей помешать . кто из них может добиться желаемого результата не в зависимости от ходов соперника