In a common but dangerous prank, a chair is pulled away as a person is moving downward to sit on it, causing the victim to land hard on the floor. suppose the victim falls by 0.50 m, the mass that moves downward is 80 kg, and the collision on the floor lasts 0.081 s. what are the magnitudes of the (a) impulse and (b) average force acting on the victim from the floor during the collision?
nicolaus copernicus presented the universe heliocentric
sound needs medium to travel and it can not travel without medium
so sound wave is a travelling wave
now we also know that sound wave propagate in form of rarefaction and compression.
so all medium particles travel in the direction of wave only
so it is a longitudinal wave also
so correct answer will be
i dont know but i need the points soory may god bless you