Найти массу груза который на пружине жесткостью 550 н\м делает 20 колебаний за 16 с

см. решение во

My weekday

I get up at 6:45. I jump out of bed, turn on the radio and do morning exercises to the music of the radio. Then I go to the bathroom, wash my face and brush my teeth with a toothbrush. It will not take me much time, no more than ten or fifteen minutes. Then I get dressed and sit down at the table to have breakfast. I usually have a cup of tea or coffee, an egg and bread and butter.

After breakfast, I go to college. Since I live far away, I ride the bus or metro. I need more time to ride the bus. If I have little time, I ride the subway. My lessons begin at 9 o’clock. We have six lessons every day. At a quarter to one we have a lunch break.

Since I cannot return home for lunch, I take it in the dining room of our college.

For lunch, I have meat or fish with potatoes and a cup of strong tea or coffee with cake. At ten minutes to three lessons have ended, and I am going home. When I get home from college, I have dinner. My dinner usually consists of three dishes.

For the first course, I have some soup, then some meat or fish. For dessert, I put out fruit or ice cream. After lunch, I help my mom wash the dishes. Then I do my homework. It usually takes me about two hours.

At eight or nine o’clock I have dinner. I have a salad, a slice of sausage and bread, yogurt or cereal.

In the evening I listen to the radio or watch TV. If the program is not interesting, I go to the cinema or to the theater. Sometimes I go for a walk with friends. We talk about different things and usually have a good time.

At 11 o'clock I go to sleep.

ρ=m/V и измеряется в кг/м куб. есть отношение массы тела к объему.

Плотность вещества — физическая величина, прямо пропорциональная массе тела и обратно пропорциональная его объёму это не верно, если бы плотность вещества была прямо пропорциональна его массе то, тогда ρ=m, неправильно, если бы плотность обратно пропорциональная объему этого тела то чем больше объем тем меньше плотность и наоборот, да из этой формулы мы видим ρ=m/V зависимость эту

пример ρ=m/V ρ=6/3 = 2    1) ρ не равно 6 2) если ρ=6/6, то видно что объем увеличился а плотность уменьшилась