Not in classical Sanskrit. Vedic Sanskrit had pitch accent, which had been lost by the classical Sanskrit era. English has stress accent. But many languages do not have stress accent, and either have pitch accent or syllables are not accented at all.

Perhaps the Giant London Flea Market will start a trend: https://www.queenelizabetholympicpark.co.uk/whats-on/giant-london-flea-market

It’s debated. One source points to the lower end of the scale established as the freezing point of a brine made by dissolving ammonium chloride in water.