In fact, it's the first version of Apple's operating system made available for the public to try before its launch. If you're not already locked into the iOS beta though, should you download iOS 9 now? We take a look at the iPhone and iPad models that are worth updating and the ones you should probably hold off.o we know that iOS 9 will run on iPhones, iPads and iPods, just not all of them. While Apple normally tries to extend the software love as far back as it can, there's inevitably some devices that miss out. Here's the full iOS 9-friendly list:
How to Use a Centrifuge. Centrifuges are often used to separate suspensions in liquids. Because of their high rotation rates, centrifuges are delicate and can break easily. However, there are only a few simple rules to remember when using them.
Best Answer: Those spinning devices are called centrifuges, and they are used to separate the blood into its component parts so that tests can be performed on that component alone. The denser materials (like red blood cells) sink to the bottom, while the lighter ones (like plasma) float to the top.