If two whistles are blown simultaneously, with respective frequencies of 505 Hz and501 Hz, evaluate the beat frequency that is heard

What is the beat frequency produced when following two waves are sounded together ?x1 = 10 sin (404πt – 5πx),x2 = 10 sin (400πt – 5πx).     4132

A train is traveling west at a velocity of 25 m/s.  Another train is traveling east directly toward the west-bound train at a velocity of 15 m/s.  The west-bound train blows its whistle with a frequency of 600 Hz when the two trains are 1000 m apart and then blows its whistle again 10 seconds later.  For passengers on the east-bound train, how will the perceived frequency of the first whistle compare with the perceived frequency of the second whistle?  (Note: Use 350 m/s for the speed of sound in air.)A.It will be 60% higher than the frequency of the second whistle.B.It will be 40% higher than the frequency of the second whistle.C.It will be approximately identical to the frequency of the second whistle.D.It will be 40% lower than the frequency of the second whistle.

A dog whistle is designed to produce a sound with a frequency beyond that which can be heard by humans. If a particular whistle produces a sound with a frequency of 2.5x10 4Hz, what is the sound’s wavelength? Assume the speed of sound in air is 343 m/s.

Describe the sound energy transformation in each situation.WHISTLING

Describe the phenomenon of beats in the superposition of two collinear oscillations with different frequencies. Derive an expression for the beat frequency and discuss its significance in wave analysis.