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

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

A wind with speed 40 m//s blows parallel to the roof of a house. The area of the roof is 250 m^(2) . Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be : (rho_(air)=1.2 kg//m^(3))

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 ?

At any point on a curve , the slope of the tangent is equal to the sum of abscissa and the product of ordinate and abscissa of that point.If the curve passes through (0,1), then the equation of the curve is

A simple pendulum is suspended from the roof of a train . If the train is moving with an acceleration 49 cm/s^2 . Then the angle of inclination of the string about the vertical will be

The safe speed of a vehicle on a horizontal curve road is independent is

Supriya stepped out into the bright street from a cinema theatre. In response, her eye pupil shrunk. Identify the muscle responsible for the same.