Сколько энергии потребовалось для приготовления кофе в медной турке (джезве), если масса воды 200 г, масса турки 300г? Вода нагревалась от 25 до 100⁰С.

Так как период колебания обратно пропорционален

квадратному корню из ускорения силы тяжести, то

это ускорение на Луне в 2.36*2.36=5.57 раз меньше,

чем на Земле.

Значит, вес всякого тела на Луне в 5.57 раз меньше,

чем на Земле.

Теперь вспомним, что по формуле Ньютона сила притяжения

равна: F=GmM/R^2, где G - постоянная тяготения, m - масса

тела, M - масса притягивающего центра (здесь - Земли

или Луны) , r - расстояние от тела до этого центра.

Для Земли F1=GmM1/(r1)^2, r1=6400,

для Луны F2=GmM2/(r2)^2, r2=?

Отсюда:

M1/M2*(r2/r1)^2=F1/F2=5.57,

81*(r2^)2=(r1)^2*5.57, (r2)^2=(6400)^2*5.57/81,

r2=6400*2.36/9=1678 км.

На самом деле немного больше (1737 км)

My best friend name is Olesya. I think she is a jack-of-all-trades. She is good to learn. She draws a great. Olesya good at riding horses. She wants to be an architect. Olesya plays the piano very good. So i think Olesya jack-of-all-trades. ! ИЛИ ТАКMy closest friend Shurik loved, it turns out, to count the crows, to beat the buckets and to drive the idler.At home he, as everyone heard in the quarter, did not hit a finger to help his grandmother. As his parents did not just get sick of returning from work, that they did not reprimand him, but he did not care. One evening, we, Shurik's friends, heard that in his place we would have been through the ground long ago and that we would have been tormented by remorse. And this, no matter what it is - in one ear flies in, the other flies. And this, he turns out, was, and when from the pot two vertices only made, and now, having grown up with the Kolomenskaya verst. Everything from him like a gusya's water, everything to him that's about the wall of peas. -