Darth Nihilus is a character in the Star Wars expanded universe, specifically in the video game "Star Wars: Knights of the Old Republic II – The Sith Lords." He is a Sith Lord who is known for his insatiable hunger for the Force, which led him to consume entire planets and their inhabitants. Nihilus is depicted as a dark and enigmatic figure, shrouded in a tattered robe and a mask that hides his true appearance. His power and presence make him a formidable and terrifying antagonist in the Star Wars universe. **

There are several books that feature Darth Nihilus, a Sith Lord from the Star Wars Expanded Universe. Some of these books include "Star Wars: Knights of the Old Republic II - The Sith Lords" by Chris Avellone, which is a video game that delves into Nihilus' backstory. Additionally, there are Star Wars novels and comics that mention or feature Darth Nihilus, such as "Star Wars: The Old Republic - Revan" by Drew Karpyshyn. Fans of the character can explore his story further through these various mediums. **

Yes, Darth Revan did fight against Darth Nihilus. In the video game "Star Wars: Knights of the Old Republic II - The Sith Lords," Revan and Nihilus are both prominent characters. They come into conflict as part of the game's storyline, with Revan ultimately facing off against Nihilus in a climactic battle. Their confrontation is a significant moment in the game's narrative and adds to the lore of the Star Wars universe. **

I would rate Darth Nihilus a 10 on the scale. He is a formidable and terrifying Sith Lord with an insatiable hunger for the Force. His ability to consume entire planets and drain the life force of living beings makes him one of the most powerful and menacing villains in the Star Wars universe. His presence alone strikes fear into the hearts of those who encounter him, earning him a perfect 10 on the scale. **

The valves on heating pipes are typically ball valves or gate valves. Ball valves have a spherical disc inside that controls the flow of water by rotating the handle, while gate valves have a gate or wedge that moves up and down to control the flow. Both types of valves are used to regulate the flow of hot water through the heating system and can be manually operated to adjust the temperature or shut off the flow completely. **

Yes, the consumption of energy-saving pumps may increase when replacing heating pipes. This is because energy-saving pumps are designed to operate more efficiently and effectively with newer heating systems and pipes. The improved performance of the energy-saving pumps may lead to increased usage, as they are able to distribute heat more evenly and effectively throughout the system. Additionally, the replacement of old pipes with newer, more efficient ones may also contribute to increased energy consumption, as the system may be able to operate more efficiently overall. **

Some recommended mixers for cocktails include soda water, tonic water, ginger beer, and fruit juices such as orange, cranberry, and pineapple. These mixers can be used to create a wide variety of classic and modern cocktails, and can be easily combined with various spirits to create refreshing and flavorful drinks. Additionally, simple syrup and bitters are also commonly used as mixers to add sweetness and depth of flavor to cocktails. **

Suspension filtration works by passing a mixture of solid particles and liquid through a filter medium. The solid particles are too large to pass through the filter, so they are retained on the surface or within the pores of the filter. The liquid, which is now free of the solid particles, passes through the filter and is collected on the other side. This process separates the solid particles from the liquid, allowing for the purification or concentration of the liquid. **