The roof of a movie theatre and a conference hall is curved. Why?

Answer the following questions: Why are ceilings of concert halls and cinema halls curved?

A pendulum suspended from the roof of a railway carriage travelling at a speed v mis round a curve of radius 'a' metres makes n oscillations per second. If the same pendulum makes n_1 oscillations per second when the carriage is stationary, what is the value of v_2 ?

Give scientific reasons : You cannot enjoy watching a movie from a very short distance from the screen in a cinema hall .

Why is p-V curve for adiabatic process steeper than that for isothermal process?

Why does th government ban certain websites, movies and cargtoons?

Why are curved roads banked ?