On This Day: 07 November 1970 Race riots in Daytona Beach ---------- ?

Questions

where was the greatest snowfall ever recorded in a single storm?

where was the first speed limit regulation of 20 mph set?

the first speed limit was set in 1903, 1906 or 1909?

what has become a custom from armored knights raising their visors to identify themselves when they rode past their king?

what was the royal name 'mountbatten' originally?