Salts are not flexible or brittle because of their ionic bond structure. The strong electrostatic forces between the positively and negatively charged ions in a salt crystal make it rigid and resistant to deformation, which prevents flexibility. Additionally, the arrangement of ions in a salt crystal does not allow for the movement of atoms or molecules that would be necessary for flexibility. This same rigid structure also makes salts resistant to being easily broken or shattered, which is why they are not brittle. **

It's possible that the Sims 4 expansion is not available if it has not been released yet or if it is not included in the version of the game you have. It's also possible that there may be a technical issue preventing the expansion from appearing in the game. I would recommend checking the game's official website or contacting customer support for more information on the availability of the expansion. **

Mattress covers that are recommended for dust mite protection are those that are specifically designed to be allergen-proof and have a pore size of less than 10 microns to prevent dust mites and their allergens from passing through. Look for covers that are made of tightly woven fabric and are also waterproof to protect against spills and stains. Additionally, it's important to choose a cover that is easy to wash and maintain to ensure long-term effectiveness in protecting against dust mites. **

Women were not allowed to join the Navy SEALs until 2015 due to the physical demands and combat roles of the SEALs. The SEALs undergo intense physical training and are required to perform in combat situations, and it was believed that women may not have been able to meet these rigorous standards. However, in recent years, the military has opened up combat roles to women and has been working to ensure that all candidates, regardless of gender, are able to meet the necessary physical and mental requirements to become a Navy SEAL. **

No, the application is flexible in terms of time. Users can access it at any time that is convenient for them, as it is available 24/7. Additionally, users can choose to use the application for short periods or longer durations based on their needs and schedule. The flexibility in timing allows users to make the most out of the application whenever they need it. **

There have been reports of some players experiencing issues with the Witcher 3 Expansion Pass not working properly. These issues could be related to a variety of factors, such as compatibility problems, account settings, or technical glitches. If you are facing difficulties with the Expansion Pass, it is recommended to reach out to the game's support team for assistance in troubleshooting and resolving the issue. **

The Sims 4 expansion may not be installing due to a few possible reasons. It could be a problem with the game files, such as corruption or missing files. Another reason could be a lack of available disk space on your computer. Additionally, there may be an issue with your internet connection or the Origin client itself. It's best to troubleshoot by checking for updates, verifying game files, freeing up disk space, and ensuring a stable internet connection. If the issue persists, reaching out to the game's support team for further assistance may be necessary. **

The iTunes album covers may not be displayed due to a variety of reasons such as a poor internet connection, a temporary issue with the iTunes server, or a problem with the device's software or settings. It could also be due to a glitch in the iTunes app itself. To troubleshoot this issue, you can try refreshing the app, checking your internet connection, restarting your device, or updating the iTunes app to see if that resolves the problem. **