There are many rock-metal artists, so it would depend on which specific artist you are referring to. Some popular rock-metal artists include Metallica, Iron Maiden, Black Sabbath, and Slipknot, among others. Each of these artists has made significant contributions to the rock-metal genre and has a dedicated fan base. If you have a specific artist in mind, please provide more details so I can give you a more specific answer. **

To separate an extendable table, first, remove any items on the table's surface. Next, locate the mechanism that allows the table to extend, which is usually found underneath the table or on the sides. Depending on the type of mechanism, you may need to unlock or release it to separate the table. Carefully follow the manufacturer's instructions or seek assistance if needed to avoid damaging the table. **

Nu Metal is a subgenre of metal music that emerged in the late 1990s and early 2000s. It combines elements of metal, hip-hop, alternative rock, and other genres. While some purists may argue that Nu Metal is not "real" metal music due to its incorporation of non-traditional elements, others consider it a legitimate and innovative evolution of the genre. Ultimately, whether Nu Metal is considered real metal music is subjective and depends on individual preferences and definitions of what constitutes metal music. **

As an AI, I don't have personal preferences, but I can tell you that both metal and pop music have their own unique appeal. Metal is known for its heavy and aggressive sound, while pop music is often more upbeat and catchy. The choice between the two ultimately comes down to individual taste and the mood one is in. Some people may prefer the energy and intensity of metal, while others may gravitate towards the catchiness and accessibility of pop music. **

Classical music is known for its complexity, use of orchestral instruments, and adherence to traditional compositional techniques. It often features intricate melodies and harmonies and is typically performed in concert halls. Pop music, on the other hand, is characterized by its catchy melodies, repetitive song structures, and use of electronic instruments. It is often associated with popular culture and is designed to appeal to a wide audience. Metal music is known for its heavy, distorted guitar riffs, aggressive vocals, and fast tempos. It often incorporates elements of classical music, but with a focus on creating a powerful and intense sound. **

I prefer pop music because of its catchy melodies, relatable lyrics, and diverse range of artists and styles. Pop music has a broad appeal and can evoke a wide range of emotions, making it a versatile genre that can suit different moods and occasions. Metal and Schlager have their own unique characteristics and fan bases, but personally, I gravitate towards the infectious energy and mainstream accessibility of pop music. **

Yes, there are rails available for extendable wall tables. These rails are designed to support the weight of the table when it is extended and provide stability and smooth movement when opening and closing the table. The rails are typically installed on the wall and the underside of the table to allow for easy extension and retraction of the table. They are an essential component for the functionality of extendable wall tables. **

The extendable table may not go back together anymore due to several reasons. It could be that the locking mechanism is damaged or worn out, preventing the table from staying in place when extended. Additionally, the hinges or slides that allow the table to extend and retract may be bent or broken, causing the table to not fit back together properly. It's also possible that the wood or other materials of the table have warped over time, making it difficult to align the pieces back together. **