Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 19 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 29 cm.

What is the wavelength of the sound?

If the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum?
Express your answer using two significant figures.

a.96cm

b.77cm

Explanation:

Highest intensity,=19cm

Lowest intensity,=29cm

48cm is the distance for half-wave, wavelength =48cm*2=96cm

b. From a, above we know that half-wavelength is 48cm

Also, the distance of known  maximum is 29cm

Next maximum is calculated as:

The next maximum will occur at 77cm

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

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explanation: