the siren on an ambulance is emitting a sound whose frequency is2550 hz. the speed of sound is 343 m/s.(a) if the ambulance is stationary and you (the"observer") are sitting in a parked car, what are the wavelengthand the frequency of the sound you hear? (b)suppose that the ambulance is moving toward you at a speed of26.3 m/s. determine the wavelength and the frequencyof the sound you hear. (c) if the ambulance ismoving toward you at a speed of 26.3 m/s and you aremoving toward it at a speed of 12.0 m/s, find thewavelength and frequency of the sound you hear.

0.13451 m

0.124196 m

0.119997901132 m

Explanation:

= Velocity of the observer

= Velocity of sound source

v = Velocity of sound in air = 343 m/s

Wavelength is given by

The wavelength is 0.13451 m

From Doppler effect we have the formula

The wavelength is 0.124196 m

The wavelength is 0.119997901132 m

grav force prop 1/r squared 2r all squared is 4rsquared 1/4rsquared quartered

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27