В медный стакан массой 200 г и температурой 10 оС налили 1,5 литра воды с температурой 20 оС и поставили на спиртовую горелку. До какой температуры нагреется стакан с водой, если в горелки сгорело 5 г спирта?
There are a lot of different professions in this world. Some of them is more suitable for men, some of them is suitable for women but today due to gender equality they are no longer so divided.
However, certain professions remain suitable mostly for men since they are considered physically hard, harmful or even dangerous.
Объяснение:My name is Natalia. I’m 15 years old. I study in the 9th grade of the state secondary school. At the moment I’m facing an important period of life when I need to choose my future profession.
По ЗСЭ (закону сохранения энергии) максимальная высота будет в момент, когда вся кинетическая энергия перейдёт в потенциальную , то-бишь : Ек = Еп , где Еп = mgh отсюда h = Ек / mg = 200 / 0,5 *10 = 40 м
Т.к. полная механическая энергия не меняется в данной замкнутой системе , то на высоте 10 м будет и кинетическая и потенциальная энергия . Полная механическая энергия - максимальная кинетическая,либо потенциальная энергия. Ek max = Ek + Ep 200дж = mv^2/2 + mgh отсюда v = sqrt( 2*(Ekmax - mgh )/m ) = 24,5 м/c
There are a lot of different professions in this world. Some of them is more suitable for men, some of them is suitable for women but today due to gender equality they are no longer so divided.
However, certain professions remain suitable mostly for men since they are considered physically hard, harmful or even dangerous.
Объяснение:My name is Natalia. I’m 15 years old. I study in the 9th grade of the state secondary school. At the moment I’m facing an important period of life when I need to choose my future profession.