Rubber seals can be made elastic by adding plasticizers to the rubber compound. Plasticizers help to increase the flexibility and stretchability of the rubber, making it more elastic. Additionally, the rubber can be vulcanized, a process that involves heating the rubber with sulfur to create cross-links between the polymer chains, which increases its elasticity. Proper formulation of the rubber compound and curing process are also important factors in ensuring the rubber seals are elastic. **

No, viscose is not elastic. Viscose is a type of rayon fabric made from natural fibers such as wood pulp. It is known for its soft and smooth texture, but it does not have the stretch or elasticity that is characteristic of elastic materials like spandex or elastane. Viscose can drape well and has good moisture-wicking properties, but it does not have the ability to stretch and bounce back like elastic fabrics do. **

Yes, the lid in the set of 4 is waterproof. It is designed to provide a tight seal to prevent any liquid from leaking out of the container. This makes it suitable for storing and transporting liquids without the risk of spills. The waterproof feature ensures that the contents of the container remain secure and protected from moisture. **

In an elastic collision, both momentum and kinetic energy are conserved. This means that the total momentum of the system before the collision is equal to the total momentum after the collision, and the total kinetic energy before the collision is equal to the total kinetic energy after the collision. During an elastic collision, the objects involved bounce off each other without any loss of kinetic energy, resulting in a transfer of momentum between the objects. This type of collision is characterized by the objects rebounding with the same relative speed and direction as before the collision. **

An example of plastic deformation is when a metal wire is bent and does not return to its original shape. This is because the metal has undergone permanent deformation. On the other hand, an example of elastic deformation is when a rubber band is stretched and then returns to its original shape once the force is removed. This is because the rubber band has undergone temporary deformation, but has not permanently changed its shape. **

The name of the elastic band is simply "elastic band." It is also commonly referred to as a rubber band in some regions. The term "elastic" refers to its ability to stretch and return to its original shape, while "band" refers to its form as a loop or strip of material. **

The elastic petticoat is typically made of a combination of materials such as nylon, spandex, and/or polyester. These materials provide the necessary stretch and flexibility to create the elastic effect of the petticoat, allowing it to comfortably fit a variety of body shapes and sizes. The specific blend of materials may vary depending on the brand and style of the petticoat. **

To set a custom resolution of 4:3, you can do so through your computer's display settings. First, right-click on your desktop and select "Display settings" or "Screen resolution." Then, look for an option to set a custom resolution and input the desired 4:3 resolution (e.g., 800x600 or 1024x768). Save the changes, and your display should now be set to the custom 4:3 resolution. Keep in mind that not all monitors or graphics cards may support every custom resolution, so you may need to experiment with different options to find one that works for your setup. **