Question

Помогите, пожалуйста! Отмечу как лучшее решение ^^.Задание.Каким способом изменяется внутренняя энергия детали в следующих случаях:а) при обработке детали на токарном станкеб) при нагревании детали в печи перед закалкой в) при сверлении в детали отверстий г) при быстром охлаждении горячей детали в воде?

Answer 1

А) увеличивается
б) увеличивается
в) не изменяется
г) уменьшается

Answer 2

How does the internal energy of a part change in the following cases?

a) When processing a part on a lathe machine: When a part is processed on a lathe machine, the internal energy of the part can change due to several factors. One of the main factors is the conversion of mechanical energy into heat energy during the cutting process. The friction between the cutting tool and the part generates heat, which increases the internal energy of the part. Additionally, the deformation of the material during the cutting process can also contribute to changes in the internal energy of the part.

b) When heating a part in an oven before quenching: Heating a part in an oven before quenching involves transferring heat energy to the part. As the part absorbs heat, its internal energy increases. This increase in internal energy is due to the thermal energy being transferred to the particles within the part, causing them to vibrate more rapidly. The increase in internal energy prepares the part for the subsequent quenching process, where it is rapidly cooled to achieve desired material properties.

c) When drilling holes in a part: When drilling holes in a part, the internal energy of the part can change due to the generation of heat during the drilling process. The friction between the drill bit and the part, as well as the deformation of the material, can lead to an increase in the internal energy of the part. The drilling process involves the conversion of mechanical energy into heat energy, which contributes to the change in internal energy.

d) When rapidly cooling a hot part in water: Rapidly cooling a hot part in water involves transferring heat energy from the part to the surrounding water. As the part loses heat, its internal energy decreases. The rapid cooling process causes the particles within the part to lose thermal energy, resulting in a decrease in their vibrational energy and a corresponding decrease in the internal energy of the part.

Please note that the information provided above is based on general knowledge of the processes involved. For more specific details and calculations, it is recommended to consult relevant textbooks or engineering references.