If you set your watch by the sound of a distant siren, will it go fast or slow ?

A man sets his watch by the sound of a siren placed at a distance 1 km away . If the velocity of sound is 330 m//s

An observer sets his watch by the sound of a signal fired from a tower yet he finds that his watch is slow by 5 s. Find the distance of the tower from the observer.The temperature of air during the observation is 20^@ C and the velocity of sound in air at 0^@ C is 332 ms^(-1) .

A man sets his watch by the noon-whistle of a factory at a distance of 1.5 kilometers. By how many seconds is his watch slower than the clock of the factory? (Velocity of sound in air is 332 m s^(-1) )

You and your friend are working in your office. Suddenly, you heard the sound of bullet. Actually, it was the sound of the bullet which was fired by your friend at your CEO. What is your reaction?

A person going away from a factory on his scooter at a speed of 36 km/hr listens to the siren of the factory. If the actual frequency of the siren is 700 Hz and a wind is blowing along the direction of the scooter at 36 km//hr, find the observed frequency heard by the person. (Given speed of sound = 340 m//s )