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Амплітуда коливань 10 см, а частота 0,5 Гц .Написати рівняння залежності х=f(t) і побудувати її графік . Визначити фазу і зміщення через 1,5 с. Через якийчас зміщення дорівнюватиме 7,1 см?
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Физика -
Автор:
pierceroman - 6 лет назад
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What?.........................
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Автор:
kenneth - 6 лет назад
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I believe we are not alone. Even if I am on the other side of the world
from
the farmhouse I live in, I still dream of the ancient vines out the window, and the
shed out back that my grandfather's father built in 1870 with eucalyptus trunks. As
long as I can recreate these images, I never quite leave home .
All of us need some grounding in our modern world of constant moving,
buying, selling, meeting and leaving. Some find constancy in religion, others in
friends or community. But we need some daily signposts that we are not different,
not better, not worse than those who came before us .
For me, this house, farm, these ancient vines are those roots. Although I
came into this world alone and will leave alone, I am not alone.
There are ghosts of dozens of conversations in the hallways, stories I
remember about buying new plows that now rust in the barnyard and ruined crops
from the same vines that we are now harvesting .
All of us are natural links in a long chain of being, and that I need to know
what time of day it is, what season is coming, whether the wind is blowing north or from the east , and
if the moon is still full tomorrow night, but human nature does not .
The physical world around us constantly changes, just as the farmers who came before me did .
We must struggle in our brief existence to find some transcendent meaning and so
find relief in the knowledge but we as well as our heart did not.
You may find that too boring, living with the past as present. I find it
refreshing. There is an old answer to every new problem, that wise whispers of the
past are with us. If we just listen and remember, we are not alone; we have been
here before.-
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