На поверхности воды в озере волна длиной 2,7 м рас со скоростью 3,5 м/с.
С точностью до сотых определи период и частоту колебаний бакена, качающегося на волнах на поверхности озера.
(Ба́кен, бакан (нидерл. baken) — плавучий знак, устанавливаемый на якоре для обозначения навигационных опасностей на пути следования судов или для ограждения фарватеров.)
ответ:
период колебаний равен
с.
частота колебаний равна
Гц.
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Rome is obviously an amazing city where you can see and visit such famous monuments as the Colosseum, the Roman Forum, the Pantheon, the Trevi Fountain and Vatican City. All these and many other tourist attractions amaze and make such a great impression that you will never be able to forget them.
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Consequently, Rome is a city where everyone can find his place. You can walk, visit museums, do shopping, go to opera and do many other things there. But there’s one thing that you will certainly do in Rome – you will enjoy yourself.
Объяснение:
т.к. первый автомобилист движется равномерно, то его координата будет выражаться как : x=x0+vt
т.к. второй движется с постоянный ускорением, то его координата изменяется по закону : x=x0+V0t+at^2/2
совмести х0 с началом координат: х0=0
т.к. они встретились, значит в определенный момент времени их координаты стали равны.
т.к. второй вышел на 20 секунд позже, значит первый двигался (t+20)c
приравниваем
V1*(t+20)=V2*(t)+a*(t)^2/2
10(t+20)=(t)^2 (после подстановки данных из условия)
t^2-10t-200=0
(t-20)(t+10)=0
t=20секунд
t=-10>0 - no
ответ : через 20 сек