Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 15 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 65 cm . Required:
What is the wavelength of the sound?

100 cm

Explanation:

It is given that there are two loudspeakers that produces along x-axis.

The maximum intensity of the sound is at a distance of = 15 cm apart.

The sound intensity becomes zero when the separation between the speakers are increased and becomes 65 cm.

Therefore, the sound waves are in the phase,

The sound waves are out of phase when

Therefore,

  = 2 (65 - 15)

  = 2 x 50

  = 100 cm

Hence the wavelength of the sound is 100 cm.

powerful computers now, not then

f=ma newton

f=100x2.5=250n