Предмет: Литература, автор: uliuabacalay

Що означає прислів'я У воді стоїть, а води просить

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Автор ответа: wowakusik

Ответ:Це означає, що людина може сама це зробити, а просить іншу людину зробити за неї.

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Newton’s physics already go half-way to Einstein, and if you really understand Newtonian relativity, you will not find it so hard to grasp the more modern theory. Imagine a compartment in a train going very smoothly at forty miles an hour. A man sitting in it drops a stone. To him it seems to fall vertically. That is to say it only moves vertically and not horizontally in relation to the other things in the compartment.
But if a man on the station platform watches the falling stone, he says it is moving horizontally at 40 miles an hour, besides its vertical movement. To him the stone appears to fall in a parabola, and to have moved forward for29 feet while it fell the first four feet. Both these man are right in the sense that their thinking is this-sided, and will enable them to calculate correctly at distance the stone will be at any time from objects on the train or the platform respectively.
The mechanics of a system are independent of the speed at which it is traveling, provided this speed remains unchanged in magnitude or direction.
Your feelings or a plumbline hung in the compartment, are affected if the train slows down, accelerates, or goes round a curve. But no mechanical observations inside the train will tell you which way the train is going. Nor will they tell you anything about the speed with which the station platform is moving round the earth’s axis, or the much greater speed sure the changes, in these speeds by a gyrostatic compass or in other ways. But you can’t measure the speeds themselves.
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Or else the speed of light from an object moving toward us, for example, Venus as an evening star, would be greater, relative to the objects on the earth, regardless of the time which the measurement is made, or the object which sends out the light.
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Again, different observers would disagree as to what events happened at the same time. The disagreement would only be measurable if the observers were moving at enormous speeds relative to one another, speeds which were an appreciable fraction of that of light, but there is no way of getting round it.
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