Answer: Your welcome!
Step-by-step explanation:
To disable the first bar on your Fire Tablet 8, simply go to Settings > Display & Sounds > Navigation Bar, and then toggle the button to "Off". This should disable the first bar on your device, and you should no longer see it.
Learning Quantum Mechanics can be a difficult task, and it usually requires a degree in Physics or a related field. It is not an easy subject to learn, as it involves complex mathematical equations and concepts. However, there are many online courses and tutorials available to help you get started. Additionally, there are many books and resources available to help you gain a better understanding of Quantum Mechanics.