Two loudspeakers emit identical sound waves along the x-axis. the sound at a point on the axis has maximum intensity when the speakers are 10 cm apart. the sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 60 cm.

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?