application for registration code (audio engineer)

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Question 1
What are the technical characteristics of a mastering for vinyl?
Question 2
What is the role of a "de-esser"? If you don't have one, what tools can you use to recreate the treatment?
Question 3
Are there volume standards on the most popular broadcast platforms (iTunes, Spotify, Deezer, YouTube, etc.) and if so, what are they?
Question 4
To add spatialization, what are the respective advantages of delay and reverb?
Question 5
What is the "pre-delay" setting of a reverb?
Question 6
What is the main difference between a multiband compressor and a dynamic equalizer?
Question 7
What is a "bandpass" filter?
Question 8
What is the "knee" setting found on some compressors?
Question 9
What is the "sidechain" offered by some compressors?
Question 10
What are "LUFS", the "loudness war", and the relationship between the two?