Предмет: Физика, автор: нik

Период колебания математического маятника T приближенно можно вычислить по формуле T=2корень из R где К-длина нити(в метрах).Найдите длину нити маятника( в метрах), период колебаний которого составляет 3 секунды.

Ответы

Автор ответа: kirills1

$T = 2 \pi \sqrt{ \frac{l}{g} }$ -------------------> l = $(\frac{T}{2 \pi } )^2 * g$

T - период ( 3 c )
π - число пи ( 3,14 )
g - ускорение свободного падения ( 10 Н / кг )

l = $( \frac{3}{2 * 3,14} )^2 * 10$ = $(\frac{3}{6,28} )^2 * 10$ = $0,477^2 * 10$ = 0,227529 * 10 = 2,27529 м

Проверка:

$T = 2 * 3,14 * \sqrt{ \frac{2,27529}{10} }$ = $6,28 * \sqrt{0,227529}$ = 6,28 * 0,477 = 2,99556 c ≈ 3 c

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Беларуская мова, автор: dashagoryachev

предложение со словом калоссе

1 год назад

Предмет: Английский язык, автор: dasha200430

Theatres in the 16th century were not like they are today. They were round buildings open to the sry in the middle. There were no lights or lamps and they showed their plays in the afternoon. The actors (men and boys only) perdormed on the stage where (1)... . Most of the audience stood to watch a play for a pennny. More expensive tickets could get you a seat in the gallery or in a box. In those days theatre (2)... the rich and the poor.
In 1598 Shakespeare's company of actors had a serious problem with renting the building. So one snowy (3)... they took their belongings to the south bank of the Thames. Then they built the theatre in just 28 days and called in The Globe.
By that time Shakespeare already had a reputation of a poet and a dramatist, or playwright. Sadly, in 1613 during a performance The Globe caught fire, (4)... . They rebuilt it but soon the Puritans closed the theatre and (5)... .
Anyway, it happened after William Shakespeare had left London for Stratford where he lived out the last years of his life and (6)..., his birthday.
During his life he wrote 37 playes, several longer poems and 154 sonnets. His sonnets are (7)..., wise and beautiful. Even nowadays people learn them by heart and remember lines from them. The great writer's plays are no less popular. One of their secrets kies in the fact that he was so great at using words: he could (and still can) make audiences sad, happy, thrilled, excited. He (8)... (a lot more than most writers). We know for a fact that Shakespeare made up about 2,000 new words himself, some of his phrases have become so common that people use them every day. His works teach us to understood life and people and will always be internationally important.

a) destroyed it again
b) was an entertainment for both
c) 14-line love poems
d) there was no scenery
e) winter's night
f) died in 1616 on April 23
g) used 18,000 different words
h) which destroyed it
нужен перевод срочно