Question

Резиновый жгут сжали,подействовав на него некоторой силой.Каков характер взаимодействия между молекулами резины?1)силы притяжения=сила отталкивания2)сила притяжения>сила отталкивания3)сила притяжения<сила отталкивания4)действуют только силы отталкиванияСравните скорость движения молекул серебра,из которого изготовлены ложки,если одна ложка находится на столе,а другая-в стакане с горячим чаем1)скорость молекул серебра одинаковая2)скорость молекул серебра ложки,которая лежит на столе,больше3)скорость молекул серебра ложки,которая лежит на столе,меньше4)ответ зависит от массы ложек

Answer 1

3)скорость молекул серебра ложки,которая лежит на столе,меньше
3)сила притяжения<сила отталкивания

Answer 2

Interaction between Rubber Molecules

When a rubber band is stretched or compressed, the interaction between its molecules plays a crucial role. Rubber is a polymer made up of long chains of repeating units called monomers. These chains are held together by weak intermolecular forces, such as Van der Waals forces.

When a rubber band is stretched, the chains of molecules are pulled apart, causing the rubber band to elongate. The stretching force applied to the rubber band overcomes the intermolecular forces, allowing the chains to slide past each other. This results in the rubber band returning to its original shape when the force is released.

The interaction between rubber molecules can be described as a combination of both attractive and repulsive forces. The attractive forces between the molecules allow them to stick together, while the repulsive forces prevent the molecules from getting too close to each other.

Comparison of Silver Spoon Molecules' Movement

The movement of molecules in a silver spoon can be compared when one spoon is placed on a table and the other is placed in a glass of hot tea.

The movement of molecules in a substance is related to its temperature. At higher temperatures, the molecules have more kinetic energy and move faster. In the case of the spoon on the table, the molecules of silver are not influenced by the hot tea, so their movement is determined solely by the ambient temperature.

On the other hand, the spoon in the glass of hot tea is in direct contact with the hot liquid. The heat from the tea is transferred to the spoon, increasing the kinetic energy of the silver molecules. As a result, the molecules in the spoon immersed in the hot tea will have a higher average speed compared to the molecules in the spoon on the table.

Therefore, the speed of the silver spoon molecules in the glass of hot tea is greater than the speed of the silver spoon molecules on the table.

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