Questions

That would depend on what kind of a rapport I had with him. If I felt comfortable, I would probably mention that being rude is probably going to be bad for him in the long run, since unhappy customers reflect badly on the sales associate. Otherwise, I would mention to the supervisor what I had witnessed, and let him handle it.

Effect of adding liquid is to make the cylinder more bottom heavy which is a more stable position

It is located in Vienna

Emphasize means giving special importance or worth giving attention to in speaking or writing.

Here in the options, Accentuate is most nearly means Emphasize.

Muthuvel Karunanidhi was an Indian writer and politician who served as Chief Minister of Tamil Nadu for five terms and twenty years between 1969 and 2011. He passed away on 7th August in Kauvery Hospital due to prolonged illness.